Peter Clarke defeated Toby Mitchell 6-1 6-1 in the Australia 1 Masters 1 round of 32 on hard. The upset overturned the form book — Toby Mitchell came in leading the head-to-head 3–0, but Peter Clarke had been the form player, winning 3 of their last 7 on hard. Peter Clarke claimed a first win over Toby Mitchell in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-04-07 | New Zealand Masters 4 | QF | hard | Toby Mitchell | 3-6 6-2 6-1 |
| 1998-03-01 | Australia 1 Masters 3 | R16 | hard | Toby Mitchell | 6-3 6-2 |
| 1997-05-10 | Australia 2 Masters 1 | R16 | hard | Toby Mitchell | 6-1 6-2 |