Oscar Rodriguez Arg defeated Juan Morgenstern 6-3 6-2 in the Ecuador Peru Masters 4 round of 16 on clay. The upset overturned the form book — Juan Morgenstern came in leading the head-to-head 1–0. Oscar Rodriguez Arg claimed a first win over Juan Morgenstern in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1996-08-31 | Argentina 2 Masters 1 | R16 | clay | Juan Morgenstern | 6-4 7-6 |