Mcclain Kessler defeated Mateo Barreiros Reyes 6-4 3-6 10-8 in the M25 Guayaquil 1 q32 on clay. The upset overturned the form book — Mateo Barreiros Reyes came in leading the head-to-head 1–0. Mcclain Kessler claimed a first win over Mateo Barreiros Reyes in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-07-26 | M25 Portoviejo 1 | Q32 | clay | Mateo Barreiros Reyes | 6-4 6-1 |
Averages over each player's completed matches in the selected window (2 vs 141). 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. Small sample — read as indicative. About