Ji Heon Im defeated Sang Soo Lee 6-3 6-4 in the Korea Masters 4 round of 32 on clay. The upset overturned the form book — Sang Soo Lee came in leading the head-to-head 1–0. Ji Heon Im claimed a first win over Sang Soo Lee in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1992-05-18 | Korea Masters 4 | R32 | clay | Sang Soo Lee | 6-2 6-2 |