Mark Parsons defeated Justin Oneal 7-6 6-4 in the USA 2 Masters 1 round of 16 on hard. The upset overturned the form book — Justin Oneal came in leading the head-to-head 1–0. Mark Parsons claimed a first win over Justin Oneal in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-07-17 | USA 2 Masters 2 | R64 | hard | Justin Oneal | 6-2 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.