Jason Cask defeated Matthew Macmahon 6-1 6-3 in the Australia 1 Masters 3 round of 32 on carpet. The result followed the form book — Jason Cask came in leading the head-to-head 1–0. Jason Cask extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-08-12 | Australia 2 Masters 3 | R16 | hard | Jason Cask | 6-4 6-2 |