Rafael Serpa Guinazu defeated Miguel Pastura 7-6 4-6 7-6 in the Chile F4 round of 32 on clay. The upset overturned the form book — Miguel Pastura came in leading the head-to-head 1–0. Rafael Serpa Guinazu claimed a first win over Miguel Pastura in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-10-09 | Chile 2 Masters 1 | R16 | clay | Miguel Pastura | 6-1 7-6 |