Nathan Ponwith defeated Collin Altamirano 6-4 1-6 6-4 in the M15 San Diego 1 round of 16 on hard. The result followed the form book — Nathan Ponwith came in ranked #1292, leading the head-to-head 1–0. Nathan Ponwith extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-01-17 | M15 Ithaca 1 | R32 | hard | Nathan Ponwith | 6-4 6-1 |
Averages over each player's completed matches in the selected window (14 vs 9). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About