Matias Oneille defeated Paulo Carvallo 6-2 6-1 in the Uruguay F2 round of 32 on clay. The upset overturned the form book — Paulo Carvallo came in leading the head-to-head 1–0, but Matias Oneille had been the form player, winning 5 of their last 10 on clay. Matias Oneille claimed a first win over Paulo Carvallo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-09-28 | Bolivia F2 | QF | clay | Paulo Carvallo | 7-5 6-4 |