Norikazu Sugiyama advanced when Tasuku Iwami retired 5-0 in the Sri Lanka F1 round of 16. Norikazu Sugiyama claimed a first win over Tasuku Iwami in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2005-09-05 | Japan F10 | SF | hard | Tasuku Iwami | 6-0 3-6 7-6(5) |
| 2004-05-24 | Japan F4 | QF | hard | Tasuku Iwami | 6-4 6-3 |
| 1999-05-12 | Japan F3 | R32 | hard | Tasuku Iwami | 6-4 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.