Yuichi Sugita defeated Dylan Seong Kwan Kim 6-0 6-0 in the Thailand F5 qualifying round on hard. The upset overturned the form book — Dylan Seong Kwan Kim came in leading the head-to-head 1–0. Yuichi Sugita claimed a first win over Dylan Seong Kwan Kim in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-04-13 | Korean Rep F2 | R32 | hard | Dylan Seong Kwan Kim | 7-6(9) 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.