Bong Soo Kim defeated Kentaro Masuda 6-2 6-2 in the Malaysia 2 Masters 4 round of 16 on hard. The upset overturned the form book — Kentaro Masuda came in leading the head-to-head 2–0, but Bong Soo Kim had been the form player, winning 6 of their last 10 on hard. Bong Soo Kim claimed a first win over Kentaro Masuda in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-11-08 | Japan Masters 1 | SF | hard | Kentaro Masuda | 6-4 6-3 |
| 1991-11-04 | Japan Masters 4 | R16 | hard | Kentaro Masuda | 3-6 6-2 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.