Timea Babos defeated Jelena Ostapenko 6-3 6-3 in the Seoul round of 32 on hard. The upset overturned the form book — Jelena Ostapenko came in leading the head-to-head 2–1, defending last year's round of 16. Timea Babos narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-03-19 | Miami | R64 | hard | Jelena Ostapenko | 6-4 6-4 |
| 2016-08-01 | Florianopolis | QF | hard | Timea Babos | 4-6 6-3 6-2 |
| 2016-04-04 | Katowice | QF | hard | Jelena Ostapenko | 7-6(3) 2-6 6-3 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.