Guillermo Duran defeated Andrea Collarini 1-6 7-5 6-3 in the Argentina F26 semi-final on clay. The upset overturned the form book — Andrea Collarini came in leading the head-to-head 2–1. Guillermo Duran narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-06-03 | Argentina F9 | QF | clay | Andrea Collarini | 7-5 6-3 |
| 2012-11-26 | Argentina F27 | SF | clay | Andrea Collarini | 4-6 6-2 6-3 |
| 2011-10-24 | Argentina F21 | QF | clay | Guillermo Duran | 6-1 6-4 |
Averages over each player's completed matches in the selected window (40 vs 199). 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