Mathieu Guenat defeated Frederic De Fays 6-4 6-3 in the Greece F5 round of 32 on carpet. The upset overturned the form book — Frederic De Fays came in leading the head-to-head 1–0. Mathieu Guenat claimed a first win over Frederic De Fays in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2007-11-19 | Dominican Republic F1 | R32 | hard | Frederic De Fays | 4-6 7-6(5) 6-0 |