Yannik Steinegger defeated Alexander Erler 6-4 6-3 in the M15 Caslano 1 q32 on clay. The upset overturned the form book — Alexander Erler came in leading the head-to-head 2–0. Yannik Steinegger claimed a first win over Alexander Erler in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-06-23 | M25 Klosters 1 | R32 | clay | Alexander Erler | 6-7(4) 6-2 6-1 |
| 2021-03-09 | M25 Trimbach 1 | R32 | carpet | Alexander Erler | 6-4 6-4 |
Averages over each player's completed matches in the selected window (127 vs 141). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About