Mattias Pennonen defeated Timo Nigri 6-2 7-6 in the Denmark Masters 1 round of 32 on clay. The upset overturned the form book — Timo Nigri came in leading the head-to-head 1–0. Mattias Pennonen claimed a first win over Timo Nigri in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-08-16 | Iran Masters 1 | R32 | clay | Timo Nigri | 7-5 6-4 |