Dong Wook Song defeated Simon Touzil 7-6 7-5 in the Philippines Thailand Masters 2 qualifying round on hard. The upset overturned the form book — Simon Touzil came in leading the head-to-head 1–0. Dong Wook Song claimed a first win over Simon Touzil in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-02-09 | Philippines Thailand Masters 4 | R16 | hard | Simon Touzil | 6-2 5-7 7-6 |