Toby Mitchell defeated Sebastian Swierk 6-2 6-2 in the Australia 4 Masters 4 round of 32 on hard. The upset overturned the form book — Sebastian Swierk came in leading the head-to-head 2–1. Toby Mitchell narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-04-07 | New Zealand F1 | R16 | hard | Sebastian Swierk | 6-3 6-4 |
| 1998-03-01 | Australia 1 Masters 1 | R16 | hard | Sebastian Swierk | 3-6 6-4 7-5 |
| 1998-03-01 | Australia 1 Masters 4 | SF | hard | Toby Mitchell | 5-7 7-4 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.