Guillermo Olaso defeated Leonardo Tavares 7-5 6-3 in the Spain F13 round of 32 on clay. The upset overturned the form book — Leonardo Tavares came in leading the head-to-head 2–1. Guillermo Olaso narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-03-11 | Portugal F4 | QF | hard | Leonardo Tavares | 6-4 4-6 6-4 |
| 2008-10-06 | Portugal F8 | R16 | clay | Leonardo Tavares | 6-0 7-5 |
| 2008-04-21 | Spain F16 | R32 | clay | Guillermo Olaso | 2-6 6-4 6-3 |
Averages over each player's completed matches in the selected window (36 vs 2). 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