Statistics Profile

Jamie Koo

2016
Golubitsky Fencing Center
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Win/loss statistics

2026-2027 2025-2026 2024-2025 2023-2024 Before 2023 All time
Victories 25 12 - - - 37
Losses 21 51 - - - 72
Win ratio 54.3% 19.0% - - - 33.9%
Pool victories 18 8 - - - 26
Pool losses 15 41 - - - 56
Pool win ratio 54.5% 16.3% - - - 31.7%
DE victories 7 4 - - - 11
DE losses 6 10 - - - 16
DE win ratio 53.8% 28.6% - - - 40.7%

Seasons start on August 1 and end on July 31.

Scores

2026-2027 2025-2026 2024-2025 2023-2024 Before 2023 All time
Easy wins† 14 1 - - - 15
Easy wins % 56.0% 8.3% - - - 40.5%
Close wins‡ 3 4 - - - 7
Close wins % 12.0% 33.3% - - - 18.9%
Close losses‡ 3 8 - - - 11
Close losses % 14.3% 15.7% - - - 15.3%
Big losses† 8 27 - - - 35
Big losses % 38.1% 52.9% - - - 48.6%

† Easy victories or big losses are 4+ touches in pools, 7+ in standard DEs, and 5+ in veteran or youth DEs.

‡ Close bouts are 1 touch or fewer in pools, 3 or fewer in standard DEs, and 2 or fewer in veteran or youth DEs.

Bouts with time expired

2026-2027 2025-2026 2024-2025 2023-2024 Before 2023 All time
Victories 2 - - - - 2
Victories % 8.0% 0.0% - - - 5.4%
Losses - 3 - - - 3
Losses % 0.0% 5.9% - - - 4.2%
Total 2 3 - - - 5
Total % 4.3% 4.8% - - - 4.6%

Events

2026-2027 2025-2026 2024-2025 2023-2024 Before 2023 All time
Events 6 10 - - - 16
Tournaments 5 7 - - - 12

Competition history

16 competitions, 109 bouts

San Diego Cup - Youth Foil #2

Y-10 Mixed Foil U, Y10 October 18, 2026

Place 6 of 19 Seed 14 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
V 5:0 TRAN Remy 5 - U 18 Team Touche Fencing Center -263 84 9.5 71%
Pool
V 4:3 YU Evelyn 8 - U 14 La International Fencing 203 94 18.3 43%
Pool
V 5:4 HSZIEH Madeline 16 - U 1 Socal Fencing Center 518 112 24.9 25%
Pool
D 3:5 CHAN Avrie 12 - U 13 Socal Fencing Center - - - -
Pool
D 3:5 WU William 2 - U 9 Socal Fencing Center - - - -
T16
V 10:8 XIE Hannah 13 - U 12 Team Touche Fencing Center 727 901 25.3 59%
T8
D 6:10 DAI Claire 6 - U 3 Golubitsky Fencing Center 1443 926 15.9 20%

San Diego Cup - Youth Foil #2

Y-12 Women's Foil U, Y12 October 18, 2026

Place 3 of 8 Seed 5 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
V 5:0 DAI Claire 1 - U 1 Golubitsky Fencing Center 723 35 37.6 13%
Pool
V 5:0 CHOI Kyuwon 7 - U 8 Golubitsky Fencing Center 630 72 24.3 23%
Pool
D 0:5 PUTMAN Allison 4 - U 6 Golubitsky Fencing Center 359 96 11.9 33%
Pool
D 3:5 BORG Annie 3 - U 3 Elite International Fencers Club -9 84 19.5 56%
Pool
D 4:5 PAYAN Camila 6 - U 5 89 65 16.3 48%
Pool
V 5:3 FIGUEROA Olivia 8 - U 7 Team Touche Fencing Center 3 49 15.3 53%
Pool
V 5:3 CHOI Mackenzie 2 - U 2 Precision Athletics Fencing Club / Team Touche Fencing Center 228 64 20.3 39%
T8
V 15:9 PUTMAN Allison 4 - U 6 Golubitsky Fencing Center 953 916 40.1 48%
T4
D 12:15 CHOI Mackenzie 2 - U 2 Precision Athletics Fencing Club / Team Touche Fencing Center 629 956 55.4 70%

LAIFC OC Rising Stars Foil #14

Y-10 Women's Foil U, Y10 October 4, 2026

Place 2 of 11 Seed 8 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 3:5 SONG Esther W 5 - U 3 Golubitsky Fencing Center 189 -41 14.2 35%
Pool
V 5:0 DE SEMIR Melanie 1 - U 9 2921 -56 54.2 < 1%
Pool
V 5:1 BULL Shane 4 - U 11 LA International Fencing 330 -1 21.7 33%
Pool
D 3:5 CHENG Jessica 10 - U 3 La International Fencing 351 20 11.5 29%
Pool
V 5:1 PUYAT Ella Victoria 9 - U 10 505 9 25.6 24%
T8
V 10:4 YU Evelyn 2 - U 5 La International Fencing 1070 842 57.1 37%
T4
V 10:7 CHENG Jessica 10 - U 3 La International Fencing 888 899 43.4 51%
T2
D 4:10 KENZHEBULATOVA Sara 11 - U 1 LA International Fencing Center 1268 943 26.3 30%

2nd BBFC Duel in the Desert SYC & RCC

Y-10 Women's Foil U, Y10 September 25, 2026

Place 25 of 41 Seed 15 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 0:5 SONG Esther W 26 - U 8 LA International Fencing 199 -97 13.8 31%
Pool
D 1:5 KUK Sophie 22 - U 3 SoCAL Fencing Center 678 -111 5.0 10%
Pool
V 5:3 HAN Joy 32 - U 32 Team Touche Fencing Center 43 -116 25.0 40%
Pool
V 5:1 MIAO Aria 34 - U 26 Silicon Valley Fencing Center 943 -91 50.9 5%
Pool
D 1:5 CHUNG Charlotte 3 6 U 1 Prime Fencing Academy 1166 -40 1.4 2%
T64
V 10:3 TAM Alisa 19 - U 40 Massialas Foundation (M Team) 1132 804 74.2 31%
T32
D 5:10 YOON Adeline 13 36 U 11 LA International Fencing / Nam Hyun Hee Fencing Academy 1112 878 35.6 36%

Fortune ROC/RJCC/RYC

Y-10 Women's Foil U, Y10 September 6, 2026

Place 13 of 46 Seed 37 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
V 5:3 ISAAC Felicity 16 - U 24 Silicon Valley Fencing Center 474 -238 52.5 12%
Pool
V 5:0 CHOW Ariel 24 - U 6 Precision Athletics Fencing Club / University Of California San Diego Ncaa 411 -186 45.7 16%
Pool
V 5:3 SUN April 32 - U 26 Socal Fencing Center 216 -140 35.1 28%
Pool
V 5:1 LAI Cambria 13 - U 32 Prime Fencing Academy / Le Fencer Academy 270 -105 33.4 28%
Pool
D 0:5 CHENG Jessica 25 - U 14 LA International Fencing 345 -71 11.6 25%
Pool
D 2:5 SUN Zoey 2 27 U 23 Silicon Valley Fencing Center 215 -83 14.0 31%
T32
V 9:6 DONG Ena 36 - U 21 Silicon Valley Fencing Center 732 780 55.5 53%
T16
D 6:10 MURPHY Ava 22 - U 3 San Francisco Fencers Club 1194 836 32.2 30%

LAIFC OC Rising Stars Foil #13

Y-10 Women's Foil U, Y10 August 16, 2026

Place 7 of 12 Seed 7 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
V 5:0 TRAN Remy 12 - U 10 Team Touche Fencing Center 28 -244 35.4 34%
Pool
D 4:5 KENZHEBULATOVA Sara 3 - U 2 LA International Fencing Center 547 -208 7.0 11%
Pool
V 5:0 PUYAT-NADJAR Ella Missing ID 2 - U 11 - - - -
Pool
D 3:5 CHO Aerin 9 - U 6 Socal Fencing Center 479 -215 8.1 14%
Pool
D 1:5 SUN Grace 11 - U 1 Socal Fencing Center 142 -223 14.9 28%
T16
V 10:1 TRAN Remy 12 - U 10 Team Touche Fencing Center 557 787 44.4 62%
T8
D 6:10 CHOW Ariel 5 - U 3 Fencers Club Hong Kong 977 831 50.9 41%

San Diego Cup - Youth Foil Championships

Y-10 Women's Foil U, Y10 May 24, 2026

Place 8 of 9 Seed 2 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 0:5 LIU Sienna 3 - U 3 Golubitsky Fencing Center 400 -266 9.3 14%
Pool
D 1:5 PEROJO Angie 7 - U 1 Team Touche Fencing Center 968 -276 1.9 2%
Pool
V 5:2 HAN Joy 6 - U 2 Team Touche Fencing Center -104 -277 33.9 39%
T8
D 0:10 PEROJO Angie 7 - U 1 Team Touche Fencing Center 1536 808 21.1 13%

San Diego Cup - Youth Foil Championships

Y-12 Women's Foil U, Y12 May 24, 2026

Place 7 of 10 Seed 10 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 0:5 RANAT Saira 3 - U 6 La International Fencing -22 -293 20.8 33%
Pool
D 0:5 DOROTEO Mia 6 - U 3 Team Touche Fencing Center 1262 -314 1.1 1%
Pool
D 3:5 BERMUDEZ Pryscilla 2 - U 2 Team Touche Fencing Center 1023 -315 1.6 2%
Pool
V 5:4 PERKINS Aaliya 7 - U 10 Still Point Fencing 258 -316 50.1 19%
T16
V 15:10 PERKINS Aaliya 7 - U 10 Still Point Fencing 1624 709 112.0 15%
T8
D 4:15 BERMUDEZ Pryscilla 2 - U 2 Team Touche Fencing Center 1789 821 13.4 8%

Fortune SYC/RJCC

Y-10 Women's Foil U, Y10 May 2, 2026

Place 63 of 80 Seed 74 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 3:5 CHANG Yuri 27 62 U 27 Socal Fencing Center 442 -228 11.1 14%
Pool
D 4:5 HALL Olivia 56 - U 55 Gold Fencing Club 717 -240 5.4 6%
Pool
D 2:4 NAM Jiwon 60 - U 34 795 -245 4.3 5%
Pool
D 2:5 SUN Zoey 22 50 U 52 Silicon Valley Fencing Center 164 -249 17.6 25%
Pool
D 1:5 YANG Lucy 49 - U 45 Massialas Foundation (M Team) -78 -267 24.6 38%
Pool
D 1:5 KIM Rylie 3 13 U 1 Maximum Fencing Club 1087 -292 1.3 1%
T128
V 10:6 SUN April 43 - U 66 Socal Fencing Center 783 650 98.2 42%
T64
D 7:10 LIN Tiffany 9 23 U 6 Prime Fencing Academy / Le Fencer Academy 1249 748 38.9 22%

San Diego Cup - Youth Foil #6

Y-10 Women's Foil U, Y10 April 19, 2026

Place 3 of 5 Seed 2 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 3:5 YI Helen 1 - U 2 Team Touche Fencing Center 325 -242 14.9 18%
Pool
D 0:5 PEROJO Angie 4 - U 1 Team Touche Fencing Center 964 -257 2.7 2%
Pool
D 2:3 JIANG Rebekah 5 - U 3 Team Touche Fencing Center 822 -259 5.2 6%
Pool
V 5:2 XIE Hannah 3 - U 5 Team Touche Fencing Center -159 -265 36.1 44%
T8
V 10:3 XIE Hannah 3 - U 5 Team Touche Fencing Center 1203 540 133.1 22%
T4
D 2:10 PEROJO Angie 4 - U 1 Team Touche Fencing Center 1508 674 23.6 10%

San Diego Cup - Youth Foil #6

Y-12 Women's Foil U, Y12 April 19, 2026

Place 11 of 11 Seed 6 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 2:5 LIU Celia 1 - U 3 La International Fencing / Orange County Fencing Center 521 -169 13.1 13%
Pool
D 1:5 FIGUEROA Olivia 7 - U 8 Cabrillo Academy Of The Sword Llc 35 -182 29.1 37%
Pool
D 1:5 FANG Victoria 5 - U 5 Team Touche Fencing Center 535 -211 11.1 12%
Pool
D 3:5 YI Helen 8 - U 6 Team Touche Fencing Center 313 -222 16.5 19%
Pool
D 0:5 PEROJO Angie 4 - U 2 Team Touche Fencing Center 963 -239 2.9 3%
T16
D 5:15 YI Helen 8 - U 6 Team Touche Fencing Center 1027 603 62.3 27%

Fortune RYC/RJCC

Y-10 Women's Foil U, Y10 March 14, 2026

Place 39 of 53 Seed 28 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 3:4 SUN Grace 37 - U 35 SoCAL Fencing Center 158 -158 31.4 31%
Pool
V 5:2 CHEUNG Esabella 21 - U 47 Universal Swords and Fitness -68 -189 53.1 43%
Pool
D 0:5 GU Alexandra 40 - U 7 Bay Area Fencing Club / Bay Area Fencing Club Pleasanton 641 -136 11.6 11%
Pool
D 1:5 ISAAC Felicity 51 - U 20 Silicon Valley Fencing Center 469 -148 16.0 16%
Pool
D 1:5 PEROJO Angie 5 29 U 8 Team Touche Fencing Center 881 -164 5.5 5%
T64
D 8:10 JOE Everly 41 - U 27 LA International Fencing 458 779 176.3 67%

San Diego Cup - Youth Foil #4

Y-10 Women's Foil U, Y10 February 8, 2026

Place 9 of 12 Seed 7 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 2:5 SUN Grace 8 - U 3 Socal Fencing Center 79 -224 41.4 32%
Pool
D 4:5 CHENG Jessica 2 - U 8 LA International Fencing Center 249 -265 27.4 21%
Pool
V 5:4 BORG Annie 3 - U 5 Elite International Fencers Club -8 -293 79.1 33%
Pool
D 4:5 JIANG Rebekah 6 - U 2 Team Touche Fencing Center 1092 -214 5.4 4%
Pool
V 5:4 XIE Hannah 11 - U 11 Team Touche Fencing Center 68 -219 61.4 35%
T16
D 8:10 CHENG Jessica 2 - U 8 LA International Fencing Center 892 937 157.7 52%

San Diego Cup - Youth Foil #4

Y-12 Women's Foil U, Y12 February 8, 2026

Place 13 of 13 Seed 13 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 3:5 YI Helen 10 - U 7 Team Touche Fencing Center 216 -75 55.7 33%
Pool
D 1:5 PEROJO Angie 4 - U 3 Team Touche Fencing Center 867 -131 12.4 6%
Pool
D 1:5 FANG Victoria 5 - U 3 Team Touche Fencing Center 435 -143 30.6 20%
Pool
D 3:5 ZEE Bella 1 - U 1 SoCAL Fencing Center 589 -174 19.8 12%
Pool
D 2:5 SUTTON Sadie 8 - U 6 Cypress Village School / Socal Fencing Center 412 -193 26.3 17%
Pool
D 0:5 QIAO Lori-Ann 7 - U 2 Team Touche Fencing Center 1070 -220 4.3 2%
T16
D 2:15 ZEE Bella 1 - U 1 SoCAL Fencing Center 975 1172 235.4 61%

Mary Rafanelli RYC/RJCC

Y-10 Women's Foil U, Y10 January 18, 2026

Place 36 of 41 Seed 36 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
D 2:5 LOPEZ-HOR Emma Meixian 33 - U 24 Golden State Fencing Academy 148 361 184.5 62%
Pool
D 1:5 LIN Clara 2 6 U 2 Precision Athletics Fencing Club 1034 176 30.9 10%
Pool
D 0:5 LI Claire 11 49 U 19 Maximum Fencing Club 495 146 72.7 30%
Pool
D 4:5 KENZHEBULATOVA Sara 14 63 U 17 LA International Fencing 589 73 49.6 22%
Pool
D 3:5 KUK Sophie 41 - U 16 SoCAL Fencing Center 464 23 51.3 26%
Pool
D 1:5 KONG Janisa 23 - U 25 SoCAL Fencing Center 422 -28 46.7 25%
T64
D 7:10 CHENG Jessica 40 - U 29 LA International Fencing 835 1673 501.1 85%

LAIFC OC Rising Stars Foil #10

Y-10 Women's Foil U, Y10 November 30, 2025

Place 8 of 12 Seed 8 Not ranked Rating U Golubitsky Fencing Center

Bout Score Opponent Seed Rank Rating Place Club Opponent
Strength		 Strength Change Win
Chance
Pool
V 5:4 YU Evelyn 3 - U 9 LA International Fencing 1022 2500 113.5 91%
Pool
D 0:5 KENZHEBULATOVA Sara 2 - U 2 LA International Fencing Center 531 2614 1513.6 98%
Pool
V 5:3 ESPIRITU Robin Amara 7 - U 11 Socal Fencing Center -240 1100 34.4 95%
Pool
D 3:5 CHOW Ariel 11 - U 6 Fencers Club Hong Kong 176 1134 525.9 89%
Pool
D 1:5 KUK Sophie 10 - U 1 Socal Fencing Center 231 608 247.6 69%
T16
V 10:6 YU Evelyn 3 - U 9 LA International Fencing 2079 2500 331.8 63%
T8
D 1:10 KENZHEBULATOVA Sara 2 - U 2 LA International Fencing Center 1231 2832 1158.6 95%