Marcos Conocente defeated Guillermo Bujniewicz 6-4 6-4 in the Bolivia F2 round of 32 on clay. The upset overturned the form book — Guillermo Bujniewicz came in leading the head-to-head 2–1. Marcos Conocente narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-05-04 | Argentina F4 | R16 | clay | Marcos Conocente | 6-4 6-2 |
| 2006-11-06 | Chile F3 | R16 | clay | Guillermo Bujniewicz | 7-5 6-3 |
| 2006-09-11 | Bolivia F1 | R16 | clay | Guillermo Bujniewicz | 7-6(5) 6-2 |