Chak Lam Coleman Wong defeated Kalman L. Boyd 7-6 6-1 in the M15 Monastir 24 semi-final on hard. The upset overturned the form book — Kalman L. Boyd came in leading the head-to-head 1–0, but Chak Lam Coleman Wong had been the form player, winning 5 of their last 7 on hard. Chak Lam Coleman Wong claimed a first win over Kalman L. Boyd in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-07-08 | M15 Monastir 27 | SF | hard | Kalman L. Boyd | 6-4 4-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.