Juan Morgenstern defeated Jose Arnedo 6-0 3-6 6-3 in the Uruguay Paraguay Masters 3 round of 32 on clay. The upset overturned the form book — Jose Arnedo came in leading the head-to-head 1–0, but Juan Morgenstern had been the form player, winning 4 of their last 10 on clay. Juan Morgenstern claimed a first win over Jose Arnedo in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1997-05-03 | Chile 1 Masters 4 | R32 | clay | Jose Arnedo | 5-2 |