Andrew Castle defeated Dick Norman 6-1 6-3 in the Japan Masters 4 qualifying round on hard. The upset overturned the form book — Dick Norman came in leading the head-to-head 1–0, but Andrew Castle had been the form player, winning 2 of their last 4 on hard. Andrew Castle claimed a first win over Dick Norman in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-11-04 | Japan Masters 1 | R16 | hard | Dick Norman | 6-7 6-4 7-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.