Guillermo Olaso defeated Joao Sousa 2-6 6-4 7-6 in the Spain F42 round of 32 on hard. The upset overturned the form book — Joao Sousa came in leading the head-to-head 2–0, but Guillermo Olaso had been the form player, winning 3 of their last 5 on hard. Guillermo Olaso claimed a first win over Joao Sousa in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-31 | Spain F19 | SF | hard | Joao Sousa | 6-7(2) 7-6(2) 2-0 |
| 2007-05-07 | Spain F17 | R16 | clay | Joao Sousa | 6-4 6-2 |
Averages over each player's completed matches in the selected window (36 vs 200). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About