Kokoro Isomura leads 2 to 0 over 2 singles meetings since 2025. Last meeting on 22/08/2026 at M15 Maanshan.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 22/08/2026 | M15 Maanshan | Semi-final | indoor hard | Isomura | 5-7 3-5 |
| 01/09/2025 | Shanghai Challenger | Qualifiers | hard | Isomura | 6-7(3) 5-7 |
| indoor hard | Isomura 1 - 0 Biryukov |
| hard | Isomura 1 - 0 Biryukov |
| 2026 | Isomura 1 - 0 Biryukov |
| 2025 | Isomura 1 - 0 Biryukov |
150 wins, 131 losses since 2021 (53.4%).
Last matches: D V D D V
186 wins, 125 losses since 2021 (59.8%).
Last matches: D D D V V
Kokoro Isomura leads 2 to 0 over 2 singles meetings since 2025.
On 22/08/2026, at M15 Maanshan (Semi-final): Kokoro Isomura won 5-7 3-5.