Helge Koll defeated Per Thornadtsson 6-4 6-7 6-2 in the Norway F1 round of 16 on carpet. The result followed the form book — Helge Koll came in leading the head-to-head 3–0. Helge Koll extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-09-20 | Sweden F1 | R32 | hard | Helge Koll | 6-2 6-3 |
| 1997-09-08 | Sweden Masters 1 | QF | carpet | Helge Koll | 4-6 6-3 6-1 |
| 1995-07-01 | Denmark Masters 1 | R32 | clay | Helge Koll | 6-2 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.