Marcos Daniel defeated Antonio Prieto 1-6 6-3 7-5 in the Brazil F2 round of 32 on hard. The upset overturned the form book — Antonio Prieto came in leading the head-to-head 1–0. Marcos Daniel claimed a first win over Antonio Prieto in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-11-02 | Brazil F3 | QF | hard | Antonio Prieto | 7-5 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.