Level, 1 wins each over 2 singles meetings since 2025. Last meeting on 24/10/2026 at Japan Open - Osaka.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 24/10/2026 | Japan Open - Osaka | Semi-final | hard | Siniakova | 6-1 6-4 |
| 22/04/2025 | Mutua Madrid Open - Madrid | Round 1 | clay | Boulter | 4-6 6-2 6-1 |
| hard | Siniakova 1 - 0 Boulter |
| clay | Siniakova 0 - 1 Boulter |
| 2026 | Siniakova 1 - 0 Boulter |
| 2025 | Siniakova 0 - 1 Boulter |
163 wins, 121 losses since 2021 (57.4%).
Last matches: D V V V V
171 wins, 119 losses since 2021 (59.0%).
Last matches: D V D V V
Level, 1 wins each over 2 singles meetings since 2025.
On 24/10/2026, at Japan Open - Osaka (Semi-final): Katerina Siniakova won 6-1 6-4.