Nathan Ponwith defeated Sam Riffice 6-2 6-4 in the M25 Edwardsville 1 semi-final on hard. The upset overturned the form book — Sam Riffice came in leading the head-to-head 1–0. Nathan Ponwith claimed a first win over Sam Riffice in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-06-16 | M25 Tulsa 1 | R32 | hard | Sam Riffice | 7-5 6-4 |
Averages over each player's completed matches in the selected window (62 vs 10). 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