Alexander Donski defeated P. Bastiaansen 7-5 6-2 in the M15 Pretoria 1 semi-final on hard. The upset overturned the form book — P. Bastiaansen came in leading the head-to-head 1–0. Alexander Donski claimed a first win over P. Bastiaansen in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-02-27 | M15 Pretoria 2 | R16 | hard | P. Bastiaansen | 1-6 6-2 4-1 |