Gaston Arturo Grimolizzi defeated Guillermo Rivera Aranguiz 7-6 0-6 6-4 in the Argentina F7 round of 32 on clay. The upset overturned the form book — Guillermo Rivera Aranguiz came in leading the head-to-head 1–0. Gaston Arturo Grimolizzi claimed a first win over Guillermo Rivera Aranguiz in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-04-13 | Argentina F1 | R32 | clay | Guillermo Rivera Aranguiz | 6-3 7-5 |
Averages over each player's completed matches in the selected window (32 vs 29). 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