Karin Knapp defeated Roberta Vinci 6-7 6-2 6-2 in the Marrakech round of 16 on clay. Karin Knapp extended the head-to-head to 4–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-10 | Toronto | R64 | hard | Roberta Vinci | 6-0 6-0 |
| 2015-05-18 | Nuremberg | F | clay | Karin Knapp | 7-6(5) 4-6 6-1 |
| 2013-08-26 | US Open | R32 | hard | Roberta Vinci | 6-4 6-3 |
| 2012-07-09 | Palermo | R32 | clay | Roberta Vinci | 6-2 6-2 |
| 2012-05-14 | Rome | R64 | clay | Karin Knapp | 6-4 2-6 6-2 |
| 2007-07-16 | Palermo | R32 | clay | Karin Knapp | 2-6 6-2 6-3 |
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 (58 vs 137). ATP, WTA & Challenger.