Simon Larose defeated Mike Mather 7-5 6-3 in the Canada F3 round of 16 on hard. The upset overturned the form book — Mike Mather came in leading the head-to-head 1–0. Simon Larose claimed a first win over Mike Mather in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-09-11 | USA 3 Masters 4 | R32 | hard | Mike Mather | 6-3 4-6 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.