Mark Petchey defeated Darren Kirk 6-2 6-3 in the Great Britain 1 Masters 4 round of 16 on carpet. The upset overturned the form book — Darren Kirk came in leading the head-to-head 1–0. Mark Petchey claimed a first win over Darren Kirk in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-05-20 | Ireland Masters 3 | R32 | carpet | Darren Kirk | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.