Patricio Heras defeated Andrea Collarini 6-3 3-6 6-1 in the Argentina F9 qualifying round on clay. The upset overturned the form book — Andrea Collarini came in leading the head-to-head 6–2. Patricio Heras narrowed the head-to-head to 6–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-24 | Argentina F10 | QF | clay | Patricio Heras | 2-6 6-3 7-6(5) |
| 2014-01-27 | Argentina F1 | QF | clay | Andrea Collarini | 6-3 6-1 |
| 2013-07-22 | Argentina F13 | F | clay | Andrea Collarini | 6-4 4-6 7-5 |
| 2013-06-03 | Argentina F9 | F | clay | Andrea Collarini | 6-1 6-4 |
| 2012-11-26 | Argentina F27 | F | clay | Patricio Heras | 3-6 7-6(8) 6-4 |
| 2011-09-12 | Argentina F15 | SF | clay | Andrea Collarini | 7-5 6-1 |
| 2011-09-05 | Argentina F14 | QF | clay | Andrea Collarini | 6-4 6-2 |
| 2011-08-08 | Argentina F10 | F | clay | Andrea Collarini | 6-4 6-3 |
Averages over each player's completed matches in the selected window (57 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