Han Cheol Shin defeated Bong Soo Kim 6-4 4-6 6-4 in the Japan Masters 4 qualifying round on hard. The upset overturned the form book — Bong Soo Kim came in leading the head-to-head 1–0. Han Cheol Shin claimed a first win over Bong Soo Kim in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-11-04 | Japan Masters 1 | SF | hard | Bong Soo Kim | 7-5 6-4 |