Marco Osorio defeated Martijn Bok 6-2 7-5 in the Cuba Mexico Masters 1 round of 32 on hard. The upset overturned the form book — Martijn Bok came in leading the head-to-head 1–0. Marco Osorio claimed a first win over Martijn Bok in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1994-10-01 | Mexico 4 Masters 1 | SF | hard | Martijn Bok | 6-2 6-0 |