Jake Delaney leads 2 to 0 over 2 singles meetings since 2025. Last meeting on 30/05/2026 at M15 Karuizawa.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 30/05/2026 | M15 Karuizawa | Semi-final | clay | Delaney | 3-6 1-6 |
| 10/07/2025 | M15 Tokyo | Round 2 | hard | Delaney | 7-6(7) 6-4 |
| clay | Delaney 1 - 0 Koyama |
| hard | Delaney 1 - 0 Koyama |
| 2026 | Delaney 1 - 0 Koyama |
| 2025 | Delaney 1 - 0 Koyama |
181 wins, 122 losses since 2021 (59.7%).
Last matches: V V D V V
38 wins, 41 losses since 2021 (48.1%).
Last matches: D D V V V
Jake Delaney leads 2 to 0 over 2 singles meetings since 2025.
On 30/05/2026, at M15 Karuizawa (Semi-final): Jake Delaney won 3-6 1-6.