Rodrigo Cerdera defeated Hermes Gamonal 6-2 6-4 in the Chile F1 FUTURES round of 16 on clay. The upset overturned the form book — Hermes Gamonal came in leading the head-to-head 3–1. Rodrigo Cerdera narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-10-18 | Paraguay F2 | QF | clay | Rodrigo Cerdera | 2-6 6-4 6-2 |
| 1998-10-19 | Argentina F4 | R32 | clay | Hermes Gamonal | 6-4 6-4 |
| 1997-05-03 | Chile 1 Masters 4 | F | clay | Hermes Gamonal | 5-7 7-6 6-4 |
| 1997-04-05 | Argentina 1 Masters 2 | R16 | clay | Hermes Gamonal | 5-7 6-4 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.