Roland Thornqvist defeated Mark Quinney 7-6 5-7 6-4 in the USA 6 Masters 3 round of 16 on hard. The upset overturned the form book — Mark Quinney came in leading the head-to-head 1–0, but Roland Thornqvist had been the form player, winning 6 of their last 10 on hard. Roland Thornqvist claimed a first win over Mark Quinney in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-10-15 | USA 6 Masters 4 | R64 | hard | Mark Quinney | 7-5 6-4 |