Carina Witthoeft defeated Sesil Karatantcheva 3-6 6-4 6-4 in the Toronto q64 on hard. The upset overturned the form book — Sesil Karatantcheva came in leading the head-to-head 2–0. Carina Witthoeft claimed a first win over Sesil Karatantcheva in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-03-06 | Indian Wells | Q64 | hard | Sesil Karatantcheva | 6-4 6-3 |
| 2014-07-21 | Sobota Rokietnica 50K | R16 | clay | Sesil Karatantcheva | 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.