Simeon Rossier defeated Jessy Kalambay 7-6 6-1 in the Switzerland F5 round of 32 on clay. The upset overturned the form book — Jessy Kalambay came in leading the head-to-head 1–0. Simeon Rossier claimed a first win over Jessy Kalambay in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-17 | Switzerland F3 | R32 | clay | Jessy Kalambay | 6-2 5-7 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.