Kentaro Masuda defeated Sang Hoon Lee 6-1 6-3 in the Malaysia 2 Masters 1 round of 32 on hard. The upset overturned the form book — Sang Hoon Lee came in leading the head-to-head 2–1. Kentaro Masuda narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-07-05 | China 1 Satellite 3 | R32 | hard | Kentaro Masuda | 6-4 6-1 |
| 1995-05-13 | Korea Masters 4 | R32 | hard | Sang Hoon Lee | 1-6 6-0 6-3 |
| 1993-05-15 | Korea Masters 3 | QF | hard | Sang Hoon Lee | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.