Mark Quinney defeated Roland Thornqvist 7-5 6-4 in the USA 6 Masters 4 round of 64 on hard. The upset overturned the form book — Roland Thornqvist came in leading the head-to-head 1–0. Mark Quinney claimed a first win over Roland Thornqvist in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-10-15 | USA 6 Masters 3 | R16 | hard | Roland Thornqvist | 7-6 5-7 6-4 |