Alejandro Fabbri defeated Guillermo Bujniewicz 6-3 6-1 in the Argentina F15 round of 32 on clay. The upset overturned the form book — Guillermo Bujniewicz came in leading the head-to-head 1–0. Alejandro Fabbri claimed a first win over Guillermo Bujniewicz in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-09-12 | Argentina F15 | R16 | clay | Guillermo Bujniewicz | 3-6 7-5 6-1 |