Juan Carlos Saez defeated Guillermo Hormazabal 6-1 6-0 in the Belgium F7 round of 16 on clay. The upset overturned the form book — Guillermo Hormazabal came in leading the head-to-head 2–1, but Juan Carlos Saez had been the form player, winning 5 of their last 9 on clay. Juan Carlos Saez narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-02-13 | Chile F1 | R32 | clay | Guillermo Hormazabal | 6-3 6-3 |
| 2010-12-13 | Chile F9 | QF | clay | Juan Carlos Saez | 5-1 |
| 2010-10-25 | Chile F2 | R32 | clay | Guillermo Hormazabal | 6-3 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.