Federico Gaio defeated Guillermo Olaso 7-5 7-6 in the Marbella CH qualifying round 1 on clay. The upset overturned the form book — Guillermo Olaso came in leading the head-to-head 2–0. Federico Gaio claimed a first win over Guillermo Olaso in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-05-27 | Italy F10 | QF | clay | Guillermo Olaso | 6-2 6-3 |
| 2009-03-30 | Italy F5 | R32 | clay | Guillermo Olaso | 6-1 6-4 |
Averages over each player's completed matches in the selected window (200 vs 30). 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