Matthew Breen defeated Matt Guyaux 6-1 6-2 in the Australia 1 Masters 4 round of 16 on hard. The result followed the form book — Matthew Breen came in leading the head-to-head 1–0. Matthew Breen extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-07-17 | USA 2 Masters 4 | R64 | hard | Matthew Breen | 6-1 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.