Steven Diez defeated Guillermo Olaso 6-7 6-1 7-5 in the Spain F9 round of 16 on clay. The upset overturned the form book — Guillermo Olaso came in leading the head-to-head 2–0. Steven Diez claimed a first win over Guillermo Olaso in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-02-06 | Spain F1 | SF | clay | Guillermo Olaso | 7-5 3-6 6-1 |
| 2010-10-25 | Spain F38 | QF | clay | Guillermo Olaso | 7-5 6-2 |
Averages over each player's completed matches in the selected window (200 vs 28). 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