Kokoro Isomura defeated Colin Sinclair 6-3 4-6 6-4 in the M15 Tokyo 2 quarter-final on hard. The upset overturned the form book — Colin Sinclair came in leading the head-to-head 1–0. Kokoro Isomura claimed a first win over Colin Sinclair in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-06-27 | M15 Maanshan 3 | QF | hard | Colin Sinclair | 6-3 6-7(6) 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.
Isomura K.: 6 days rest · 2 matches, 46 games (7d). Higher means fresher. About