Martin Lee defeated Ross Matheson 3-6 7-6 6-4 in the Great Britain 4 Masters 1 semi-final on hard. Martin Lee extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-09-23 | Great Britain F7 | F | hard | Martin Lee | 4-6 7-5 6-4 |
| 1994-08-28 | Great Britain 3 Masters 3 | R16 | grass | Ross Matheson | 6-2 6-7 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.