Andrea Collarini defeated Tomas Buchhass 6-0 6-2 in the Argentina F26 round of 32 on clay. The upset overturned the form book — Tomas Buchhass came in leading the head-to-head 1–0, but Andrea Collarini had been the form player, winning 3 of their last 6 on clay. Andrea Collarini claimed a first win over Tomas Buchhass in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-12-03 | Argentina F28 | R32 | clay | Tomas Buchhass | 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.