Jantje Tilbuerger defeated Lia Karatancheva 6-1 6-7 11-9 in the W25 Daytona Beach q16 on clay. The result followed the form book — Jantje Tilbuerger came in leading the head-to-head 2–0. Jantje Tilbuerger extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-11-16 | W25 Naples | Q16 | clay | Jantje Tilbuerger | 7-5 7-6(6) |
| 2021-06-15 | W25 Sumter | Q16 | hard | Jantje Tilbuerger | 6-2 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.