Andrea Petkovic defeated Karin Knapp 6-4 6-1 in the Biberach 50K round of 16 on hard. The upset overturned the form book — Karin Knapp came in leading the head-to-head 1–0. Andrea Petkovic claimed a first win over Karin Knapp in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-10-14 | Luxembourg | R16 | hard | Karin Knapp | 7-5 7-5 |
Averages over each player's completed matches in the selected window (200 vs 163). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About