Gianluca Naso defeated Guillermo Hormazabal 6-3 6-4 in the Italy F10 round of 16 on clay. The upset overturned the form book — Guillermo Hormazabal came in leading the head-to-head 1–0. Gianluca Naso claimed a first win over Guillermo Hormazabal in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-11-08 | Chile F3 | R32 | clay | Guillermo Hormazabal | 6-4 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.