Paulino Alonso defeated Patricio Delgado 6-4 6-3 in the Bolivia Chile Masters 4 round of 16 on clay. The upset overturned the form book — Patricio Delgado came in leading the head-to-head 1–0, but Paulino Alonso had been the form player, winning 4 of their last 10 on clay. Paulino Alonso claimed a first win over Patricio Delgado in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1992-08-10 | Ecuador Masters 3 | R32 | clay | Patricio Delgado | 6-4 6-2 |