Alexandre Bonatto defeated Eduardo Magadan Castro 7-5 6-2 in the Mexico F16 qualifying round on hard. The upset overturned the form book — Eduardo Magadan Castro came in leading the head-to-head 1–0. Alexandre Bonatto claimed a first win over Eduardo Magadan Castro in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2003-09-29 | Mexico F15 | R32 | hard | Eduardo Magadan Castro | 7-6(0) 6-4 |