Sung Hee Han defeated Yi Chen 6-3 6-4 in the Seoul 25K round of 16 on hard. The upset overturned the form book — Yi Chen came in leading the head-to-head 1–0. Sung Hee Han claimed a first win over Yi Chen in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-05-24 | Goyang 25K | R32 | hard | Yi Chen | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.