Rodrigo Cerdera defeated Walter Grinovero 6-0 6-0 in the Argentina F4 round of 32 on clay. The upset overturned the form book — Walter Grinovero came in leading the head-to-head 1–0. Rodrigo Cerdera claimed a first win over Walter Grinovero in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-19 | Uruguay F1 | SF | clay | Walter Grinovero | 7-5 7-6 |