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, levelling the head-to-head at 1–1.
Rodriguez Arg O. took it in straight sets.
Oscar Rodriguez Arg beat Juan Morgenstern 6-3 6-2. Umpiry, "Oscar Rodriguez Arg vs Juan Morgenstern — Ecuador Peru Masters 4 Round of 16", https://umpiry.com/match/1997-08-09/arg-vs-morgenstern-ecuador-peru-masters-4-r16?utm_source=cite (as of 9 August 1997).