Hermes Gamonal defeated Guillermo Hormazabal 7-5 6-4 in the Italy F23 semi-final on clay. Hermes Gamonal extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-11-20 | Chile F5 | QF | clay | Guillermo Hormazabal | 6-1 6-2 |
| 2004-08-09 | Chile F1B | R32 | clay | Hermes Gamonal | 6-3 6-7(7) 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.