Guillermo Olaso defeated Steven Diez 7-5 6-2 in the Spain F38 qualifying round on clay. Guillermo Olaso extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-04-16 | Spain F9 | R16 | clay | Steven Diez | 6-7(4) 6-1 7-5 |
| 2012-02-06 | Spain F1 | SF | clay | Guillermo Olaso | 7-5 3-6 6-1 |
Averages over each player's completed matches in the selected window (39 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