Cheong Eui Kim defeated Jumpei Yamasaki 2-6 6-4 7-6 in the M15 Chiang Rai 2 round of 32 on hard. The upset overturned the form book — Jumpei Yamasaki came in leading the head-to-head 2–0. Cheong Eui Kim claimed a first win over Jumpei Yamasaki in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-04-05 | M15 Kashiwa 1 | QF | hard | Jumpei Yamasaki | 6-4 3-6 6-4 |
| 2018-05-07 | China F5 | R16 | hard | Jumpei Yamasaki | 6-2 7-5 |
Averages over each player's completed matches in the selected window (3 vs 6). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About