Mark Nielsen defeated Tasuku Iwami 6-3 7-6 in the Japan F10 final on hard. The result followed the form book — Mark Nielsen came in leading the head-to-head 3–2. Mark Nielsen extended the head-to-head to 4–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-04-12 | Japan F1 | QF | carpet | Mark Nielsen | 6-7(7) 6-2 6-2 |
| 2003-09-01 | Japan F6 | QF | hard | Tasuku Iwami | 6-4 6-2 |
| 2000-05-01 | China F2 | QF | hard | Mark Nielsen | 6-3 7-5 |
| 1999-10-25 | Japan F6 | QF | carpet | Mark Nielsen | 6-4 6-1 |
| 1998-03-25 | Japan F2 | R32 | carpet | Tasuku Iwami | 6-7 7-5 6-2 |
Averages over each player's completed matches in the selected window (2 vs 1). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About