Marcel Zimmermann defeated Jakob Sude 7-6 6-4 in the Switzerland F3 round of 16 on carpet. The upset overturned the form book — Jakob Sude came in leading the head-to-head 1–0. Marcel Zimmermann claimed a first win over Jakob Sude in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-01-17 | Germany F2 | R16 | hard | Jakob Sude | 6-3 3-6 7-6(4) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.