Jamie Koo

2016

Win/Loss Statistics

2025-2026 2024-2025 2023-2024 2022-2023 Before 2022 All Time
Victories 5 - - - - 5
Losses 22 - - - - 22
Win Ratio 18.5% - - - - 18.5%
Pool Victories 4 - - - - 4
Pool Losses 18 - - - - 18
Pool Win Ratio 18.2% - - - - 18.2%
DE Victories 1 - - - - 1
DE Losses 4 - - - - 4
DE Win Ratio 20.0% - - - - 20.0%

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† - - - - - -
Easy wins as % of wins 0.0% - - - - 0.0%
Close wins‡ 3 - - - - 3
Close wins as % of all wins 60.0% - - - - 60.0%
Close losses‡ 4 - - - - 4
Close losses as % of all losses 18.2% - - - - 18.2%
Big losses† 10 - - - - 10
Big losses as % of all losses 45.5% - - - - 45.5%

† 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.

Events

2025-2026 2024-2025 2023-2024 2022-2023 Before 2022 All Time
Events 4 - - - - 4
Tournaments 3 - - - - 3

Competition History

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 16 -49 76.8 46%
Pool D 4:5 CHENG Jessica 2 U 8 LA International Fencing Center 267 -126 44.6 27%
Pool V 5:4 BORG Annie 3 U 5 Elite International Fencers Club -1 -171 88.4 40%
Pool D 4:5 JIANG Rebekah 6 U 2 Team Touche Fencing Center 1092 -82 9.3 7%
Pool V 5:4 XIE Hannah 11 U 11 Team Touche Fencing Center 64 -92 67.2 42%
T16 D 8:10 CHENG Jessica 2 U 8 LA International Fencing Center 835 1189 258.5 68%

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 238 359 168.1 57%
Pool D 1:5 PEROJO Angie 4 U 3 Team Touche Fencing Center 843 191 47.2 17%
Pool D 1:5 FANG Victoria 5 U 3 Team Touche Fencing Center 429 144 77.0 34%
Pool D 3:5 ZEE Bella 1 U 1 SoCAL Fencing Center 569 67 50.3 22%
Pool D 2:5 SUTTON Sadie 8 U 6 Cypress Village School / Socal Fencing Center 410 17 55.1 28%
Pool D 0:5 QIAO Lori-Ann 7 U 2 Team Touche Fencing Center 1069 -38 11.0 5%
T16 D 2:15 ZEE Bella 1 U 1 SoCAL Fencing Center 944 1673 484.3 82%

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
Pool D 1:5 LIN Clara 2 6 U 2 Precision Athletics Fencing Club
Pool D 0:5 LI Claire 11 49 U 19 Maximum Fencing Club
Pool D 4:5 KENZHEBULATOVA Sara 14 63 U 17 LA International Fencing
Pool D 3:5 KUK Sophie 41 U 16 SoCAL Fencing Center
Pool D 1:5 KONG Janisa 23 U 25 SoCAL Fencing Center
T64 D 7:10 CHENG Jessica 40 U 29 LA International Fencing

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 1514.2 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%