Marcelo Charpentier defeated Gilbert Schaller 6-4 6-4 in the San Marino quarter-final on clay. The upset overturned the form book — Gilbert Schaller came in defending last year's round of 16, but Marcelo Charpentier had been the form player, winning 8 of their last 10 on clay.
Charpentier M. took it in straight sets.
Marcelo Charpentier beat Gilbert Schaller 6-4 6-4. Umpiry, "Marcelo Charpentier vs Gilbert Schaller — San Marino Quarter-final", https://umpiry.com/match/1996-08-05/charpentier-vs-schaller-san-marino-qf?utm_source=cite (as of 5 August 1996).