Kirsten Flipkens defeated Kiki Bertens 5-7 6-3 7-6 in the Nurnberg quarter-final on clay. The result followed the form book — Kirsten Flipkens came in leading the head-to-head 2–1, defending last year's round of 16. Kirsten Flipkens extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-10-01 | Beijing | R32 | hard | Kiki Bertens | 6-1 6-1 |
| 2018-06-11 | S-Hertogenbosch | R16 | grass | Kirsten Flipkens | 6-4 6-7(6) 6-1 |
| 2013-08-05 | Toronto | R32 | hard | Kirsten Flipkens | 7-5 3-6 6-2 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.