Lionel Noviski defeated Matias Oneille 6-2 3-6 6-1 in the Argentina F10 round of 32 on clay. The upset overturned the form book — Matias Oneille came in leading the head-to-head 3–0, but Lionel Noviski had been the form player, winning 5 of their last 8 on clay. Lionel Noviski claimed a first win over Matias Oneille in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-01-26 | Costa Rica F1 | R32 | hard | Matias Oneille | 6-0 6-4 |
| 2002-09-23 | Bolivia F3 | R32 | clay | Matias Oneille | 6-4 6-4 |
| 2001-08-06 | Argentina F8 | R32 | clay | Matias Oneille | 6-2 6-0 |