Guillermo Olaso defeated Jose Checa Calvo 2-6 6-1 7-6 in the Turkey 1 1 qualifying round on clay. The upset overturned the form book — Jose Checa Calvo came in leading the head-to-head 2–0. Guillermo Olaso claimed a first win over Jose Checa Calvo in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-07-09 | Italy F17 | F | clay | Jose Checa Calvo | 6-2 6-4 |
| 2007-04-02 | Turkey F1 | R16 | clay | Jose Checa Calvo | 6-2 6-0 |
Averages over each player's completed matches in the selected window (39 vs 8). 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