Guillermo Bujniewicz advanced when Diego Cristin retired 6-7 6-0 2-0 in the Argentina F16 round of 32. Guillermo Bujniewicz claimed a first win over Diego Cristin in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-08-14 | Argentina F12 | R16 | clay | Diego Cristin | 6-0 6-2 |