Pablo Martin Adalia defeated Guillermo Olaso 6-3 3-6 7-6 in the Spain F13 round of 16 on clay. The upset overturned the form book — Guillermo Olaso came in leading the head-to-head 1–0. Pablo Martin Adalia claimed a first win over Guillermo Olaso in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-01-31 | Spain F4 | QF | clay | Guillermo Olaso | 6-3 7-6(6) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.