Guillermo Hormazabal defeated Carlos Avellan 6-2 6-2 in the Argentina F2 round of 32 on clay. The result followed the form book — Guillermo Hormazabal came in leading the head-to-head 3–0. Guillermo Hormazabal extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-04-28 | Italy F11 | R32 | clay | Guillermo Hormazabal | 6-3 7-6(6) |
| 2005-05-02 | Venezuela 1 Satellite 3 | R32 | hard | Guillermo Hormazabal | 7-6(8) 3-6 6-0 |
| 2004-05-03 | Colombia F1 | R32 | clay | Guillermo Hormazabal | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.