Mark Nielsen defeated Sergio Gaoni 2-6 6-4 6-4 in the New Zealand Masters 4 round of 16 on hard. The result followed the form book — Mark Nielsen came in leading the head-to-head 1–0. Mark Nielsen extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-05-10 | Australia 2 Masters 1 | R16 | hard | Mark Nielsen | 7-5 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.