Guillermo Olaso defeated Pedro Clar Rossello 7-6 6-2 in the Spain F42 round of 32 on clay. The result followed the form book — Guillermo Olaso came in leading the head-to-head 3–1. Guillermo Olaso extended the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-02-06 | Spain F1 | F | clay | Guillermo Olaso | 2-6 6-3 6-3 |
| 2011-01-31 | Spain F4 | SF | clay | Guillermo Olaso | 6-7(2) 6-1 6-4 |
| 2010-10-25 | Spain F38 | SF | clay | Guillermo Olaso | 1-6 6-3 6-2 |
| 2009-06-01 | Spain F19 | R32 | hard | Pedro Clar Rossello | 7-6(2) 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.