Luksika Kumkhum defeated Su Jeong Jang 6-4 6-4 in the Tokyo qualifying round 2 on hard. The upset overturned the form book — Su Jeong Jang came in leading the head-to-head 1–0, but Luksika Kumkhum had been the form player, winning 4 of their last 7 on hard. Luksika Kumkhum claimed a first win over Su Jeong Jang in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-02-10 | Fed Cup G1 RR: THA vs KOR | RR | hard | Su Jeong Jang | 5-7 6-2 6-2 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.