Karin Knapp defeated Polona Hercog 6-2 6-1 in the New Haven qualifying round 2 on hard. The result followed the form book — Karin Knapp came in leading the head-to-head 2–1. Karin Knapp extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-07-20 | Bad Gastein | QF | clay | Karin Knapp | 7-6(5) 7-5 |
| 2014-05-19 | Nuremberg | R16 | clay | Karin Knapp | 6-3 6-3 |
| 2011-07-11 | Palermo | R32 | clay | Polona Hercog | 5-7 6-4 6-2 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.