Jason Cask defeated Wayne Arthurs 6-7 6-2 6-4 in the Australia 1 Masters 2 round of 32 on carpet. The upset overturned the form book — Wayne Arthurs came in leading the head-to-head 1–0. Jason Cask claimed a first win over Wayne Arthurs in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-10-07 | Australia 3 Masters 1 | R32 | clay | Wayne Arthurs | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.