Andrea Collarini defeated Guillermo Duran 4-6 6-2 6-3 in the Argentina F27 semi-final on clay. The upset overturned the form book — Guillermo Duran came in leading the head-to-head 2–1. Andrea Collarini 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 |
| 2012-11-19 | Argentina F26 | SF | clay | Guillermo Duran | 1-6 7-5 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 (199 vs 40). 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