Bastian Knittel defeated Stefan Seifert 5-7 6-4 6-4 in the Germany F19 semi-final on hard. The upset overturned the form book — Stefan Seifert came in leading the head-to-head 1–0. Bastian Knittel claimed a first win over Stefan Seifert in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-01-28 | Germany F4 | F | carpet | Stefan Seifert | 4-6 7-6(4) 6-4 |
Averages over each player's completed matches in the selected window (1 vs 2). 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. Small sample — read as indicative. About