Mathieu Guenat defeated Walter Trusendi 7-6 7-6 in the Switzerland F1 round of 32 on carpet. The upset overturned the form book — Walter Trusendi came in leading the head-to-head 1–0. Mathieu Guenat claimed a first win over Walter Trusendi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-04-27 | Italy F8 | R32 | clay | Walter Trusendi | 7-5 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.