Miha Gregorc defeated Martin Vilarrubi 3-6 7-6 6-0 in the El Salvador F1 round of 16 on clay. The upset overturned the form book — Martin Vilarrubi came in leading the head-to-head 1–0. Miha Gregorc claimed a first win over Martin Vilarrubi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-01-16 | Guatemala F1 | R32 | hard | Martin Vilarrubi | 7-5 7-5 |