Kalman L. Boyd defeated Chak Lam Coleman Wong 6-4 4-6 6-4 in the M15 Monastir 27 semi-final on hard. The upset overturned the form book — Chak Lam Coleman Wong came in leading the head-to-head 1–0. Kalman L. Boyd claimed a first win over Chak Lam Coleman Wong in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-06-17 | M15 Monastir 24 | SF | hard | Chak Lam Coleman Wong | 7-6(5) 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.