Go deeper before the next race.

Open every racecard in full and get your research done before they go to post.

  • 14racecard tabs per race
  • 20+bookmaker prices side by side
  • Trackeralerts when your horses are declared

30-day free trial

£0today

Start my 30-day free trial

By continuing you agree to our Terms and Intellectual Property and Acceptable Use policy.

£0 today. Card on step 2. £24.99 from day 31.Cancel any time.

Understudy (GB) silks

Horse profile

Understudy (GB, 2022)

Sea The Stars (IRE) × Sequester (GB) (Selkirk (USA))
Sex
filly
Foaled
2022
Colour
chestnut

See also: Understudy (GB) · Reg Hollinshead · 9 runs · 0 wins

Highest OR
102
Record (GB & IRE)
1 win from 6 runs (17%)
Prize money (GB & IRE)
£76,267 GB
Official rating
101 (Flat)
Last run (GB & IRE)
20 Nov 2025, Lingfield (AW) (2/13)
Last win (GB & IRE)
31 May 2025, Southwell (AW)
Recent form
412562

Understudy has no declared runs or entries in Britain or Ireland at the moment.

Form

Race record

DateCoursePosSPBtnJockeyTrainerRaceClassTypeDistGoingWgtORWinner / 2ndWinner prizeDaysFuture form
20 Nov 25Lingfield (AW)2/133/11¼Robert HavlinJohn & Thady GosdenBetMGM River Eden EBF Fillies' StakesListedFlat AW1m5fStandard9-0101Fairy Glen (FR)£36,862550/5
26 Sep 25Newmarket6/1110/12½Oisin MurphyJohn & Thady GosdenPrincess Royal Stakes (Sponsored By BOYLE Sports) (Fillies & Mares)Group 3Flat Turf1m4fGood to Firm8-12102Silent Love (IRE)£48,204691/7
19 Jul 25Newmarket (July)5/104/111¼Oisin MurphyJohn & Thady GosdenRic And Mary Hambro Aphrodite Fillies' StakesListedFlat Turf1m4fGood to Soft8-9102Spirited Style (GB)£25,520301/8
19 Jun 25Ascot2/1140/13¼Robert HavlinJohn & Thady GosdenRibblesdale Stakes (Fillies)Group 2Flat Turf1m4fGood to Firm9-2-Garden Of Eden (IRE)£141,775190/9
31 May 25Southwell (AW)1/105/4Fwon 4¼Tyler HeardJohn & Thady GosdenSky Sports Racing Sky 415 Fillies' Novice StakesClass 5Flat AW1m4fStandard8-13-Coedana (IRE)£3,768290/8
2 May 25Newmarket4/613/24¾Oisin MurphyJohn & Thady GosdenDarley EBF Maiden Fillies' StakesClass 2Flat Turf1m2fGood9-1-Zgharta (IRE)£20,616-0/4
  • 2/1320 Nov 25 · Lingfield (AW)3/1

    BetMGM River Eden EBF Fillies' Stakes

    Listed1m5fStandard

    All fields
    Date
    20 Nov 25
    Course
    Lingfield (AW)
    Pos
    2/13
    SP
    3/1
    Btn
    1¼
    Race
    BetMGM River Eden EBF Fillies' Stakes
    Class
    Listed
    Type
    Flat AW
    Dist
    1m5f
    Going
    Standard
    Wgt
    9-0
    OR
    101
    Winner / 2nd
    Fairy Glen (FR)
    Winner prize
    £36,862
    Days
    55
    Future form
    0/5
  • 6/1126 Sep 25 · Newmarket10/1

    Princess Royal Stakes (Sponsored By BOYLE Sports) (Fillies & Mares)

    Group 31m4fGood to Firm

    All fields
    Date
    26 Sep 25
    Course
    Newmarket
    Pos
    6/11
    SP
    10/1
    Btn
    2½
    Race
    Princess Royal Stakes (Sponsored By BOYLE Sports) (Fillies & Mares)
    Class
    Group 3
    Type
    Flat Turf
    Dist
    1m4f
    Going
    Good to Firm
    Wgt
    8-12
    OR
    102
    Winner / 2nd
    Silent Love (IRE)
    Winner prize
    £48,204
    Days
    69
    Future form
    1/7
  • 5/1019 Jul 25 · Newmarket (July)4/1

    Ric And Mary Hambro Aphrodite Fillies' Stakes

    Listed1m4fGood to Soft

    All fields
    Date
    19 Jul 25
    Course
    Newmarket (July)
    Pos
    5/10
    SP
    4/1
    Btn
    11¼
    Race
    Ric And Mary Hambro Aphrodite Fillies' Stakes
    Class
    Listed
    Type
    Flat Turf
    Dist
    1m4f
    Going
    Good to Soft
    Wgt
    8-9
    OR
    102
    Winner prize
    £25,520
    Days
    30
    Future form
    1/8
  • 2/1119 Jun 25 · Ascot40/1

    Ribblesdale Stakes (Fillies)

    Group 21m4fGood to Firm

    All fields
    Date
    19 Jun 25
    Course
    Ascot
    Pos
    2/11
    SP
    40/1
    Btn
    3¼
    Race
    Ribblesdale Stakes (Fillies)
    Class
    Group 2
    Type
    Flat Turf
    Dist
    1m4f
    Going
    Good to Firm
    Wgt
    9-2
    OR
    -
    Winner prize
    £141,775
    Days
    19
    Future form
    0/9
  • 1/1031 May 25 · Southwell (AW)5/4F

    Sky Sports Racing Sky 415 Fillies' Novice Stakes

    Class 51m4fStandard

    All fields
    Date
    31 May 25
    Course
    Southwell (AW)
    Pos
    1/10
    SP
    5/4F
    Btn
    won 4¼
    Race
    Sky Sports Racing Sky 415 Fillies' Novice Stakes
    Class
    Class 5
    Type
    Flat AW
    Dist
    1m4f
    Going
    Standard
    Wgt
    8-13
    OR
    -
    Winner / 2nd
    Coedana (IRE)
    Winner prize
    £3,768
    Days
    29
    Future form
    0/8
  • 4/62 May 25 · Newmarket13/2

    Darley EBF Maiden Fillies' Stakes

    Class 21m2fGood

    All fields
    Date
    2 May 25
    Course
    Newmarket
    Pos
    4/6
    SP
    13/2
    Btn
    4¾
    Race
    Darley EBF Maiden Fillies' Stakes
    Class
    Class 2
    Type
    Flat Turf
    Dist
    1m2f
    Going
    Good
    Wgt
    9-1
    OR
    -
    Winner / 2nd
    Zgharta (IRE)
    Winner prize
    £20,616
    Days
    -
    Future form
    0/4

Every British and Irish run since 1990, latest first. Btn is the overall distance beaten (lengths). Where the horse won, the runner-up and winning margin are shown.

Future form: next-time-out winners from this horse's races

DateCourseRaceThis horseWinner next timeTheir posWon onAtRace won
26 Sep 25NewmarketPrincess Royal Stakes (Sponsored By BOYLE Sports) (Fillies & Mares)6/11Karmology (GB)210 Oct 25NewmarketNewmarket Pony Academy Pride Stakes (Fillies & Mares)
19 Jul 25Newmarket (July)Ric And Mary Hambro Aphrodite Fillies' Stakes5/10Favorite Memory (GB)914 Aug 25SalisburyBritish EBF Premier Fillies' Handicap
  • 6/1126 Sep 25 · Newmarket

    Princess Royal Stakes (Sponsored By BOYLE Sports) (Fillies & Mares)

    All fields
    Date
    26 Sep 25
    Course
    Newmarket
    Race
    Princess Royal Stakes (Sponsored By BOYLE Sports) (Fillies & Mares)
    This horse
    6/11
    Winner next time
    Karmology (GB)
    Their pos
    2
    Won on
    10 Oct 25
    At
    Newmarket
    Race won
    Newmarket Pony Academy Pride Stakes (Fillies & Mares)
  • 5/1019 Jul 25 · Newmarket (July)

    Ric And Mary Hambro Aphrodite Fillies' Stakes

    All fields
    Date
    19 Jul 25
    Course
    Newmarket (July)
    Race
    Ric And Mary Hambro Aphrodite Fillies' Stakes
    This horse
    5/10
    Winner next time
    Favorite Memory (GB)
    Their pos
    9
    Won on
    14 Aug 25
    Race won
    British EBF Premier Fillies' Handicap

Other runners from this horse's races (latest 20 races with a next-time-out winner, up to 40 rows) that won on their next start in Britain or Ireland. FF on the race record = next-time-out winners / runners that have run again (this horse excluded).

Trainer changes

TrainerFirst runLast runFirst run for yardOR first runOR last runBest ORRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
John & Thady Gosden2 May 2520 Nov 254/6102101102612016.7%50.0%£76,267€0
John & Thady Gosden
First run
2 May 25
Last run
20 Nov 25
First run for yard
4/6
OR first run
102
OR last run
101
Best OR
102
Runs
6
Wins
1
2nd
2
3rd
0
Win %
16.7%
Place %
50.0%
Prize GB (£)
£76,267
Prize IRE (€)
€0

Trained by one trainer throughout its British and Irish career.

Stats

Career summary by code (GB & IRE)

CodeRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)Best ORFirst runLast run
Flat612016.7%50.0%£76,267€01022 May 2520 Nov 25
Flat
Code
Flat
Runs
6
Wins
1
2nd
2
3rd
0
Win %
16.7%
Place %
50.0%
Prize GB (£)
£76,267
Prize IRE (€)
€0
Best OR
102
First run
2 May 25
Last run
20 Nov 25

Placed = 1st in 2-4 runners, 1st-2nd in 5-7, 1st-3rd in 8+.

By race type

Race typeRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
Flat Turf40100.0%25.0%£58,524€0
Flat AW211050.0%100.0%£17,743€0
Flat Turf
Race type
Flat Turf
Runs
4
Wins
0
2nd
1
3rd
0
Win %
0.0%
Place %
25.0%
Prize GB (£)
£58,524
Prize IRE (€)
€0
Flat AW
Race type
Flat AW
Runs
2
Wins
1
2nd
1
3rd
0
Win %
50.0%
Place %
100.0%
Prize GB (£)
£17,743
Prize IRE (€)
€0

By going

GoingRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
Good to Firm20100.0%50.0%£54,898€0
Good10000.0%0.0%£2,416€0
Good to Soft10000.0%0.0%£1,211€0
Standard211050.0%100.0%£17,743€0
Good to Firm
Going
Good to Firm
Runs
2
Wins
0
2nd
1
3rd
0
Win %
0.0%
Place %
50.0%
Prize GB (£)
£54,898
Prize IRE (€)
€0
Good
Going
Good
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£2,416
Prize IRE (€)
€0
Good to Soft
Going
Good to Soft
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£1,211
Prize IRE (€)
€0
Standard
Going
Standard
Runs
2
Wins
1
2nd
1
3rd
0
Win %
50.0%
Place %
100.0%
Prize GB (£)
£17,743
Prize IRE (€)
€0

By distance

DistanceRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
9f to 11f10000.0%0.0%£2,416€0
12f to 13f512020.0%60.0%£73,851€0
9f to 11f
Distance
9f to 11f
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£2,416
Prize IRE (€)
€0
12f to 13f
Distance
12f to 13f
Runs
5
Wins
1
2nd
2
3rd
0
Win %
20.0%
Place %
60.0%
Prize GB (£)
£73,851
Prize IRE (€)
€0

Flat bands: 5f-6f, 7f-1m, 9f-11f, 12f-13f, 14f+. NH bands: 2m-2m1f, 2m2f-2m5f, 2m6f-3m1f, 3m2f+.

By course

CourseRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
Newmarket20000.0%0.0%£3,564€0
Southwell (AW)1100100.0%100.0%£3,768€0
Ascot10100.0%100.0%£53,750€0
Lingfield (AW)10100.0%100.0%£13,975€0
Newmarket (July)10000.0%0.0%£1,211€0
Newmarket
Course
Newmarket
Runs
2
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£3,564
Prize IRE (€)
€0
Southwell (AW)
Course
Southwell (AW)
Runs
1
Wins
1
2nd
0
3rd
0
Win %
100.0%
Place %
100.0%
Prize GB (£)
£3,768
Prize IRE (€)
€0
Ascot
Course
Ascot
Runs
1
Wins
0
2nd
1
3rd
0
Win %
0.0%
Place %
100.0%
Prize GB (£)
£53,750
Prize IRE (€)
€0
Lingfield (AW)
Course
Lingfield (AW)
Runs
1
Wins
0
2nd
1
3rd
0
Win %
0.0%
Place %
100.0%
Prize GB (£)
£13,975
Prize IRE (€)
€0
Newmarket (July)
Course
Newmarket (July)
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£1,211
Prize IRE (€)
€0

By class

ClassRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
Group 210100.0%100.0%£53,750€0
Group 310000.0%0.0%£1,148€0
Listed20100.0%50.0%£15,186€0
Class 210000.0%0.0%£2,416€0
Class 51100100.0%100.0%£3,768€0
Group 2
Class
Group 2
Runs
1
Wins
0
2nd
1
3rd
0
Win %
0.0%
Place %
100.0%
Prize GB (£)
£53,750
Prize IRE (€)
€0
Group 3
Class
Group 3
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£1,148
Prize IRE (€)
€0
Listed
Class
Listed
Runs
2
Wins
0
2nd
1
3rd
0
Win %
0.0%
Place %
50.0%
Prize GB (£)
£15,186
Prize IRE (€)
€0
Class 2
Class
Class 2
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£2,416
Prize IRE (€)
€0
Class 5
Class
Class 5
Runs
1
Wins
1
2nd
0
3rd
0
Win %
100.0%
Place %
100.0%
Prize GB (£)
£3,768
Prize IRE (€)
€0

Pattern (Group/Grade/Listed) shown ahead of class. Irish races carry no class, so they are grouped as handicap or non-handicap.

By field size

RunnersRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
6 to 8 runners10000.0%0.0%£2,416€0
9 to 12 runners411025.0%50.0%£59,876€0
13 to 16 runners10100.0%100.0%£13,975€0
6 to 8 runners
Runners
6 to 8 runners
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£2,416
Prize IRE (€)
€0
9 to 12 runners
Runners
9 to 12 runners
Runs
4
Wins
1
2nd
1
3rd
0
Win %
25.0%
Place %
50.0%
Prize GB (£)
£59,876
Prize IRE (€)
€0
13 to 16 runners
Runners
13 to 16 runners
Runs
1
Wins
0
2nd
1
3rd
0
Win %
0.0%
Place %
100.0%
Prize GB (£)
£13,975
Prize IRE (€)
€0

By month

MonthRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
May210050.0%50.0%£6,184€0
June10100.0%100.0%£53,750€0
July10000.0%0.0%£1,211€0
September10000.0%0.0%£1,148€0
November10100.0%100.0%£13,975€0
May
Month
May
Runs
2
Wins
1
2nd
0
3rd
0
Win %
50.0%
Place %
50.0%
Prize GB (£)
£6,184
Prize IRE (€)
€0
June
Month
June
Runs
1
Wins
0
2nd
1
3rd
0
Win %
0.0%
Place %
100.0%
Prize GB (£)
£53,750
Prize IRE (€)
€0
July
Month
July
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£1,211
Prize IRE (€)
€0
September
Month
September
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£1,148
Prize IRE (€)
€0
November
Month
November
Runs
1
Wins
0
2nd
1
3rd
0
Win %
0.0%
Place %
100.0%
Prize GB (£)
£13,975
Prize IRE (€)
€0

By jockey

JockeyRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
Oisin Murphy30000.0%0.0%£4,774€0
Robert Havlin20200.0%100.0%£67,725€0
Tyler Heard1100100.0%100.0%£3,768€0
Oisin Murphy
Runs
3
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£4,774
Prize IRE (€)
€0
Robert Havlin
Runs
2
Wins
0
2nd
2
3rd
0
Win %
0.0%
Place %
100.0%
Prize GB (£)
£67,725
Prize IRE (€)
€0
Tyler Heard
Runs
1
Wins
1
2nd
0
3rd
0
Win %
100.0%
Place %
100.0%
Prize GB (£)
£3,768
Prize IRE (€)
€0

By trainer

TrainerRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
John & Thady Gosden612016.7%50.0%£76,267€0
John & Thady Gosden
Runs
6
Wins
1
2nd
2
3rd
0
Win %
16.7%
Place %
50.0%
Prize GB (£)
£76,267
Prize IRE (€)
€0

By headgear

HeadgearRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
No headgear612016.7%50.0%£76,267€0
No headgear
Headgear
No headgear
Runs
6
Wins
1
2nd
2
3rd
0
Win %
16.7%
Place %
50.0%
Prize GB (£)
£76,267
Prize IRE (€)
€0

Headgear codes as declared: b blinkers, v visor, p cheekpieces, t tongue strap, h hood, e/s eyeshield.

By days since last run

Days since last runRunsWins2nd3rdWin %Place %Prize GB (£)Prize IRE (€)
Debut / no previous run10000.0%0.0%£2,416€0
15 to 30 days311033.3%66.7%£58,729€0
31 to 60 days10100.0%100.0%£13,975€0
61 to 120 days10000.0%0.0%£1,148€0
Debut / no previous run
Days since last run
Debut / no previous run
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£2,416
Prize IRE (€)
€0
15 to 30 days
Days since last run
15 to 30 days
Runs
3
Wins
1
2nd
1
3rd
0
Win %
33.3%
Place %
66.7%
Prize GB (£)
£58,729
Prize IRE (€)
€0
31 to 60 days
Days since last run
31 to 60 days
Runs
1
Wins
0
2nd
1
3rd
0
Win %
0.0%
Place %
100.0%
Prize GB (£)
£13,975
Prize IRE (€)
€0
61 to 120 days
Days since last run
61 to 120 days
Runs
1
Wins
0
2nd
0
3rd
0
Win %
0.0%
Place %
0.0%
Prize GB (£)
£1,148
Prize IRE (€)
€0

Counted from the previous run in Britain or Ireland; runs abroad are not seen.

Pedigree

Pedigree

Sire branchSea The Stars (IRE)

Parent · 1

  1. SireSea The Stars (IRE)

Grandparents · 2

  1. Sire's sireCape Cross (IRE)
  2. Sire's damUrban Sea (USA)

Great-grandparents · 4

  1. Sire's sire's sireNot traced
  2. Sire's sire's damNot traced
  3. Sire's dam's sireNot traced
  4. Sire's dam's damNot traced
Dam branchSequester (GB)

Parent · 1

  1. DamSequester (GB)

Grandparents · 2

  1. Dam's sireSelkirk (USA)
  2. Dam's damAl Theraab (USA)

Great-grandparents · 4

  1. Dam's sire's sireNot traced
  2. Dam's sire's damNot traced
  3. Dam's dam's sireRoberto (USA)
  4. Dam's dam's damNot traced
Sea The Stars (IRE)
Sequester (GB)
Cape Cross (IRE)
Urban Sea (USA)
Selkirk (USA)
Al Theraab (USA)
Not traced
Not traced
Not traced
Not traced
Not traced
Not traced
Roberto (USA)
Not traced

Breeding card

HorseUnderstudy (GB)
Sexfilly
Foaled2022
SireSea The Stars (IRE)
DamSequester (GB)
DamsireSelkirk (USA)
Sire's sireCape Cross (IRE)
Sire's damUrban Sea (USA)
2nd damAl Theraab (USA)
2nd dam's sireRoberto (USA)
Dam's produce3 winners from 4 runners
Notable siblingAmerican Flag (IRE)

Female line

  1. Sequester (GB) · by Selkirk (USA) · 3 winners from 4 runners
  2. Al Theraab (USA) · by Roberto (USA) · 6 winners from 12 runners
  3. Golden Lamb (USA) · 1 winners from 2 runners

Sire, dam and damsire

SireDamDamsireBreederFoaledColourSexSire's avg winning distanceDamsire's avg winning distance
Sea The Stars (IRE)Sequester (GB)Selkirk (USA)Bjorn Nielsen20 Feb 22chestnutfillyFlat 10.8f · NH 2m2fFlat 8.4f · NH 2m2½f
Sea The Stars (IRE)
Breeder
Bjorn Nielsen
Foaled
20 Feb 22
Colour
chestnut
Sex
filly
Sire's avg winning distance
Flat 10.8f · NH 2m2f
Damsire's avg winning distance
Flat 8.4f · NH 2m2½f

Progeny of Sea The Stars (IRE) in this horse's best conditions

ConditionRunsWinsPlacedWin %Place %This horse runsThis horse wins
All Flat runs7,2801,1812,73416.2%37.6%61
At 12f to 13f2,01635277817.5%38.6%51
On AW going2,25537988316.8%39.2%21
At 12f to 13f on AW going6089725916.0%42.6%21
All Flat runs
Condition
All Flat runs
Runs
7,280
Wins
1,181
Placed
2,734
Win %
16.2%
Place %
37.6%
This horse runs
6
This horse wins
1
At 12f to 13f
Condition
At 12f to 13f
Runs
2,016
Wins
352
Placed
778
Win %
17.5%
Place %
38.6%
This horse runs
5
This horse wins
1
On AW going
Condition
On AW going
Runs
2,255
Wins
379
Placed
883
Win %
16.8%
Place %
39.2%
This horse runs
2
This horse wins
1
At 12f to 13f on AW going
Condition
At 12f to 13f on AW going
Runs
608
Wins
97
Placed
259
Win %
16.0%
Place %
42.6%
This horse runs
2
This horse wins
1

Best distance band and going band are where this horse has most wins (then places, then runs) in its main code. Sire figures: all British and Irish runs by the sire's progeny since 1990.

Sea The Stars (IRE) × Selkirk (USA) mares (the cross)

CodeRunnersWinnersWinners %Black-type winnersRunsWins2nd/3rdWin %Prize GB (£)Prize IRE (€)
Flat8675.0%0306920.0%£229,199€0
Flat
Code
Flat
Runners
8
Winners
6
Winners %
75.0%
Black-type winners
0
Runs
30
Wins
6
2nd/3rd
9
Win %
20.0%
Prize GB (£)
£229,199
Prize IRE (€)
€0

All British and Irish runners by this sire out of mares by this damsire, since 1990 (includes this horse). Black type = Group/Grade 1-3 or Listed winner.

Best of the cross

HorseRunsWinsBlack-type winsPrize GB (£)Prize IRE (€)
Jammrah (GB)110£5,940€0
Starletina (IRE)210£2,911€0
Sea The Bloom (GB)510£4,272€0
Queen Of The Stars (GB)510£4,846€0
Understudy (GB)610£76,267€0
American Flag (IRE)610£9,551€0
Daryz (FR)200£125,412€0
Azophi (IRE)300£0€0
Jammrah (GB)
Runs
1
Wins
1
Black-type wins
0
Prize GB (£)
£5,940
Prize IRE (€)
€0
Starletina (IRE)
Runs
2
Wins
1
Black-type wins
0
Prize GB (£)
£2,911
Prize IRE (€)
€0
Sea The Bloom (GB)
Runs
5
Wins
1
Black-type wins
0
Prize GB (£)
£4,272
Prize IRE (€)
€0
Queen Of The Stars (GB)
Runs
5
Wins
1
Black-type wins
0
Prize GB (£)
£4,846
Prize IRE (€)
€0
Understudy (GB)
Runs
6
Wins
1
Black-type wins
0
Prize GB (£)
£76,267
Prize IRE (€)
€0
American Flag (IRE)
Runs
6
Wins
1
Black-type wins
0
Prize GB (£)
£9,551
Prize IRE (€)
€0
Daryz (FR)
Runs
2
Wins
0
Black-type wins
0
Prize GB (£)
£125,412
Prize IRE (€)
€0
Azophi (IRE)
Runs
3
Wins
0
Black-type wins
0
Prize GB (£)
£0
Prize IRE (€)
€0

Top 12 by best win level, then wins.

Ratings

Official ratings

CodeCurrent ORHighest ORLowest ORRated runs
Flat1011021013
Flat
Code
Flat
Current OR
101
Highest OR
102
Lowest OR
101
Rated runs
3

Current OR here is the mark carried on the latest run in each code; the page header uses a newer declared mark where one exists.

Official rating by run

DateCourseCodeORChangePos
20 Nov 25Lingfield (AW)Flat101-12/13
26 Sep 25NewmarketFlat10206/11
19 Jul 25Newmarket (July)Flat102-5/10
  • 2/1320 Nov 25 · Lingfield (AW)
    All fields
    Date
    20 Nov 25
    Course
    Lingfield (AW)
    Code
    Flat
    OR
    101
    Change
    -1
    Pos
    2/13
  • 6/1126 Sep 25 · Newmarket
    All fields
    Date
    26 Sep 25
    Course
    Newmarket
    Code
    Flat
    OR
    102
    Change
    0
    Pos
    6/11
  • 5/1019 Jul 25 · Newmarket (July)
    All fields
    Date
    19 Jul 25
    Course
    Newmarket (July)
    Code
    Flat
    OR
    102
    Change
    -
    Pos
    5/10

Current mark v winning marks

CodeCurrent OROR last runChangeHighest ORv highest
Flat1011010102-1
Flat
Code
Flat
Current OR
101
OR last run
101
Change
0
Highest OR
102
v highest
-1

Differences are current OR minus the mark shown (positive = higher now). Current OR in the main code uses a newer declared or published mark where one exists.

Family

Dam summary

Sequester (GB)

G1 winners
0
Produce
3 winners from 4 runners

Full siblings

Half siblings

By Golden Horn (GB)

By Mastercraftsman (IRE)

Female line

  1. 1Sequester (GB) · by Selkirk (USA)
  2. 2Al Theraab (USA) · by Roberto (USA)
  3. 3Golden Lamb (USA)

Notable relatives

Uncle (out of 2nd dam)

View full Golden Lamb family

In brief

How old is Understudy?

Understudy (GB) is a 4-year-old chestnut filly, foaled on 20 February 2022.

Who are the sire and dam of Understudy?

Understudy (GB) is by Sea The Stars (IRE) out of Sequester (GB), a daughter of Selkirk (USA), and was bred by Bjorn Nielsen.

Who trains Understudy?

Understudy (GB) is trained by John & Thady Gosden and owned by B E Nielsen, and has run for no other trainer in Britain or Ireland.

What is Understudy's race record?

In Britain and Ireland, Understudy (GB) has won 1 of 6 races (17%). Runs abroad (for example in France, Dubai or the USA) are not included.

What is Understudy's biggest win?

Understudy (GB)'s only win in Britain or Ireland came in the Sky Sports Racing Sky 415 Fillies' Novice Stakes at Southwell (AW) on 31 May 2025.

Has Understudy ever been beaten?

Understudy (GB) has been beaten 5 times in 6 runs in Britain and Ireland, the first time on 2 May 2025 at Newmarket (4th of 6).

What is Understudy's official rating?

Understudy (GB) is officially rated 101 on the Flat (career high 102).

When did Understudy last run?

Understudy (GB) last ran in Britain or Ireland on 20 November 2025 at Lingfield (AW) in the BetMGM River Eden EBF Fillies' Stakes, finishing 2nd of 13.

Is Understudy related to any top horses?

Understudy (GB)'s black-type relatives in Britain and Ireland include Albert Hall (GB) (uncle, Group 2 winner), from the Golden Lamb (USA) family.

What is Understudy's record at Newmarket?

Understudy (GB) has run most often at Newmarket, with no wins from 2 runs there.

Go deeper before the next race.

Open every racecard in full and get your research done before they go to post.

  • 14racecard tabs per race
  • 20+bookmaker prices side by side
  • Trackeralerts when your horses are declared

30-day free trial

£0today

Start my 30-day free trial

By continuing you agree to our Terms and Intellectual Property and Acceptable Use policy.

£0 today. Card on step 2. £24.99 from day 31.Cancel any time.

Updated