Gunawan Trismuwantara defeated Michael Zhu 6-4 6-3 in the M25 Bali 1 q32 on hard. The upset overturned the form book — Michael Zhu came in leading the head-to-head 1–0, but Gunawan Trismuwantara had been the form player, winning 1 of their last 4 on hard. Gunawan Trismuwantara claimed a first win over Michael Zhu in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-07-31 | M15 Bali 1 | R16 | hard | Michael Zhu | 7-5 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.