Matias Oneille defeated Rodrigo Cerdera 7-6 6-7 6-0 in the Chile F2 round of 16 on clay. The upset overturned the form book — Rodrigo Cerdera came in leading the head-to-head 6–2. Matias Oneille narrowed the head-to-head to 6–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2001-03-12 | Argentina F1 | R32 | clay | Matias Oneille | 6-3 6-2 |
| 1999-11-01 | Argentina F4 | QF | clay | Rodrigo Cerdera | 7-6 6-1 |
| 1999-09-13 | Peru F3 | R32 | clay | Matias Oneille | 6-3 6-4 |
| 1999-07-31 | Argentina 2 Masters 4 | QF | clay | Rodrigo Cerdera | 6-3 7-5 |
| 1999-07-31 | Argentina 2 Masters 1 | R32 | clay | Rodrigo Cerdera | 6-3 6-1 |
| 1999-07-31 | Argentina 2 Masters 3 | R16 | clay | Rodrigo Cerdera | 6-4 6-4 |
| 1999-05-29 | Argentina 1 Masters 2 | SF | clay | Rodrigo Cerdera | 6-1 6-4 |
| 1999-05-17 | Chile F2 | R32 | clay | Rodrigo Cerdera | 6-2 6-4 |