Mark Nielsen defeated Peter Clarke 6-1 7-5 in the Australia 2 Masters 4 qualifying round on hard. The result followed the form book — Mark Nielsen came in leading the head-to-head 3–0. Mark Nielsen extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-05-10 | Australia 2 Masters 3 | QF | hard | Mark Nielsen | 6-3 4-6 6-2 |
| 1998-04-07 | New Zealand Masters 1 | R32 | hard | Mark Nielsen | 6-1 |
| 1996-09-22 | Australia 2 Masters 3 | R32 | hard | Mark Nielsen | 6-2 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.