Nicolas Jara Lozano defeated Tomas Buchhass 1-6 6-3 7-6 in the Argentina F18 round of 16 on clay. The upset overturned the form book — Tomas Buchhass came in leading the head-to-head 1–0. Nicolas Jara Lozano claimed a first win over Tomas Buchhass in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-10 | Argentina F6 | R32 | clay | Tomas Buchhass | 6-3 3-6 6-2 |