Francisco Clavet defeated Claudio Mezzadri 6-0 6-1 in the San Marino round of 16 on clay. The upset overturned the form book — Claudio Mezzadri came in defending last year's quarter-final, but Francisco Clavet had been the form player, winning 2 of their last 4 on clay.
Clavet F. took it in straight sets.
Francisco Clavet beat Claudio Mezzadri 6-0 6-1. Umpiry, "Francisco Clavet vs Claudio Mezzadri — San Marino Round of 16", https://umpiry.com/match/1992-07-27/clavet-vs-mezzadri-san-marino-r16?utm_source=cite (as of 27 July 1992).