Simon Touzil defeated Eui Jong Chang 3-6 6-1 6-4 in the Philippines Thailand Masters 3 qualifying round on hard. The upset overturned the form book — Eui Jong Chang came in leading the head-to-head 1–0. Simon Touzil claimed a first win over Eui Jong Chang in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-02-09 | Philippines Thailand Masters 1 | R16 | hard | Eui Jong Chang | 6-2 6-4 |