Martin Klizan defeated Mikael Ymer 6-3 6-2 in the Pullach CH quarter-final on clay. The upset overturned the form book — Mikael Ymer came in leading the head-to-head 1–0, but Martin Klizan had been the form player, winning 7 of their last 9 on clay. Martin Klizan claimed a first win over Mikael Ymer in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-05-17 | Lyon | Q1 | clay | Mikael Ymer | 6-3 1-6 6-4 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (200 vs 199). ATP, WTA & Challenger.