Jan Mertl defeated Vaclav Safranek 7-5 6-4 in the Czech Republic F1 semi-final on clay. The upset overturned the form book — Vaclav Safranek came in leading the head-to-head 1–0, but Jan Mertl had been the form player, winning 3 of their last 7 on clay. Jan Mertl claimed a first win over Vaclav Safranek in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-01-23 | Kazakhstan F1 | QF | hard | Vaclav Safranek | 5-7 6-2 7-6(2) |
Averages over each player's completed matches in the selected window (98 vs 200). 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