Tjahjono Tjahjono defeated Matthew Porter 6-7 6-1 6-2 in the Indonesia Masters 3 qualifying round on hard. The upset overturned the form book — Matthew Porter came in leading the head-to-head 1–0. Tjahjono Tjahjono claimed a first win over Matthew Porter in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-08-25 | Indonesia Masters 2 | R16 | hard | Matthew Porter | 6-2 6-3 |