Mark Nielsen defeated Naoki Arimoto 6-4 7-5 in the Japan F6 round of 16 on hard. The result followed the form book — Mark Nielsen came in leading the head-to-head 2–0. Mark Nielsen extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-06-07 | Japan 1 Masters 1 | R16 | hard | Mark Nielsen | 6-4 6-2 |
| 1999-06-07 | Japan 1 Masters 2 | R32 | hard | Mark Nielsen | 6-2 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.