Tetsuya Chaen defeated Peter Clarke 2-6 6-3 6-0 in the Indonesia Masters 2 round of 16 on hard. The upset overturned the form book — Peter Clarke came in leading the head-to-head 1–0. Tetsuya Chaen claimed a first win over Peter Clarke in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-05-10 | Australia 2 Masters 4 | R16 | hard | Peter Clarke | 6-7 6-2 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.