Jamie Koo

2016

Win/Loss Statistics

2025-2026 2024-2025 2023-2024 2022-2023 Before 2022 All Time
Victories 8 - - - - 8
Losses 37 - - - - 37
Win Ratio 17.8% - - - - 17.8%
Pool Victories 6 - - - - 6
Pool Losses 30 - - - - 30
Pool Win Ratio 16.7% - - - - 16.7%
DE Victories 2 - - - - 2
DE Losses 7 - - - - 7
DE Win Ratio 22.2% - - - - 22.2%

Note: Seasons start on August 1st and end on July 31st.

Scores

2025-2026 2024-2025 2023-2024 2022-2023 Before 2022 All Time
Easy wins† 1 - - - - 1
Easy wins as % of wins 12.5% - - - - 12.5%
Close wins‡ 3 - - - - 3
Close wins as % of all wins 37.5% - - - - 37.5%
Close losses‡ 7 - - - - 7
Close losses as % of all losses 18.9% - - - - 18.9%
Big losses† 19 - - - - 19
Big losses as % of all losses 51.4% - - - - 51.4%

† Easy victories or big losses are those with the score difference of 4 or more touches in a pool, 7 or more touches in direct elimination, and 5 or more in veteran and youth direct elimination.
‡ Close bouts are those with the score difference of 1 or fewer touches in a pool, 3 or fewer touches in direct elimination, or 2 or fewer touches in veteran or youth direct elimination.

Bouts with Time Expired

2025-2026 2024-2025 2023-2024 2022-2023 Before 2022 All Time
Victories - - - - - -
Victories as % of all victories 0.0% - - - - 0.0%
Losses 2 - - - - 2
Losses as % of all losses 5.4% - - - - 5.4%
Total 2 - - - - 2
Total as % of all bouts 4.4% - - - - 4.4%

Events

2025-2026 2024-2025 2023-2024 2022-2023 Before 2022 All Time
Events 7 - - - - 7
Tournaments 5 - - - - 5

Competition History

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 Chance of
Victory
Pool D 3:5 YI Helen 1 U 2 Team Touche Fencing Center 324 -243 14.9 18%
Pool D 0:5 PEROJO Angie 4 U 1 Team Touche Fencing Center 963 -258 2.6 2%
Pool D 2:3 JIANG Rebekah 5 U 3 Team Touche Fencing Center 821 -261 5.2 6%
Pool V 5:2 XIE Hannah 3 U 5 Team Touche Fencing Center -160 -266 36.1 44%
T8 V 10:3 XIE Hannah 3 U 5 Team Touche Fencing Center 1203 541 133.1 22%
T4 D 2:10 PEROJO Angie 4 U 1 Team Touche Fencing Center 1507 674 23.7 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 Chance of
Victory
Pool D 2:5 LIU Celia 1 U 3 La International Fencing / Orange County Fencing Center 521 -171 13.1 13%
Pool D 1:5 FIGUEROA Olivia 7 U 8 Cabrillo Academy Of The Sword Llc 35 -184 29.0 37%
Pool D 1:5 FANG Victoria 5 U 5 Team Touche Fencing Center 534 -213 11.0 12%
Pool D 3:5 YI Helen 8 U 6 Team Touche Fencing Center 312 -224 16.5 19%
Pool D 0:5 PEROJO Angie 4 U 2 Team Touche Fencing Center 963 -241 2.9 3%
T16 D 5:15 YI Helen 8 U 6 Team Touche Fencing Center 1028 603 62.2 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 Chance of
Victory
Pool D 3:4 SUN Grace 37 U 35 SoCAL Fencing Center 157 -159 31.4 31%
Pool V 5:2 CHEUNG Esabella 21 U 47 Universal Swords and Fitness -79 -190 52.5 43%
Pool D 0:5 GU Alexandra 40 U 7 Bay Area Fencing Club / Bay Area Fencing Club Pleasanton 639 -138 11.6 11%
Pool D 1:5 ISAAC Felicity 51 U 20 Silicon Valley Fencing Center 467 -149 16.1 16%
Pool D 1:5 PEROJO Angie 5 29 U 8 Team Touche Fencing Center 880 -165 5.5 5%
T64 D 8:10 JOE Everly 41 U 27 LA International Fencing 459 779 176.2 67%

San Diego Cup - Youth Foil #4

Y-10 Women's Foil (None, 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 Chance of
Victory
Pool D 2:5 SUN Grace 8 U 3 Socal Fencing Center 78 -225 41.4 32%
Pool D 4:5 CHENG Jessica 2 U 8 LA International Fencing Center 246 -267 27.6 21%
Pool V 5:4 BORG Annie 3 U 5 Elite International Fencers Club -9 -294 79.1 33%
Pool D 4:5 JIANG Rebekah 6 U 2 Team Touche Fencing Center 1091 -215 5.4 4%
Pool V 5:4 XIE Hannah 11 U 11 Team Touche Fencing Center 66 -220 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 (None, 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 Chance of
Victory
Pool D 3:5 YI Helen 10 U 7 Team Touche Fencing Center 213 -76 55.9 33%
Pool D 1:5 PEROJO Angie 4 U 3 Team Touche Fencing Center 867 -132 12.3 6%
Pool D 1:5 FANG Victoria 5 U 3 Team Touche Fencing Center 435 -144 30.6 20%
Pool D 3:5 ZEE Bella 1 U 1 SoCAL Fencing Center 588 -175 19.8 12%
Pool D 2:5 SUTTON Sadie 8 U 6 Cypress Village School / Socal Fencing Center 411 -195 26.3 17%
Pool D 0:5 QIAO Lori-Ann 7 U 2 Team Touche Fencing Center 1070 -221 4.3 2%
T16 D 2:15 ZEE Bella 1 U 1 SoCAL Fencing Center 975 1172 235.3 61%

Mary Rafanelli RYC/RJCC

Y-10 Women's Foil (None, 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 Chance of
Victory
Pool D 2:5 LOPEZ-HOR Emma Meixian 33 U 24 Golden State Fencing Academy 146 360 184.5 62%
Pool D 1:5 LIN Clara 2 6 U 2 Precision Athletics Fencing Club 1034 175 30.9 10%
Pool D 0:5 LI Claire 11 49 U 19 Maximum Fencing Club 494 144 72.7 30%
Pool D 4:5 KENZHEBULATOVA Sara 14 63 U 17 LA International Fencing 589 72 49.5 22%
Pool D 3:5 KUK Sophie 41 U 16 SoCAL Fencing Center 463 22 51.3 26%
Pool D 1:5 KONG Janisa 23 U 25 SoCAL Fencing Center 421 -29 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 Chance of
Victory
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 530 2614 1514.1 98%
Pool V 5:3 ESPIRITU Robin Amara 7 U 11 Socal Fencing Center -240 1099 34.4 95%
Pool D 3:5 CHOW Ariel 11 U 6 Fencers Club Hong Kong 172 1134 527.0 89%
Pool D 1:5 KUK Sophie 10 U 1 Socal Fencing Center 230 607 247.3 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%