Kokoro Isomura defeated Colin Sinclair 6-3 4-6 6-4 in the M15 Tokyo 2 quarter-final on hard. Kokoro Isomura moved ahead in the head-to-head, 2–1.
Isomura K. came through in three sets.
Kokoro Isomura beat Colin Sinclair 6-3 4-6 6-4. Umpiry, "Kokoro Isomura vs Colin Sinclair — M15 Tokyo 2 Quarter-final", https://umpiry.com/match/2025-07-11/isomura-vs-sinclair-m15-tokyo-2-qf?utm_source=cite (as of 11 July 2025).