Thomas Muster defeated David Rikl 6-4 6-1 in the San Marino semi-final on clay. The upset overturned the form book — David Rikl came in defending last year's round of 32.
Muster T. took it in straight sets.
Thomas Muster beat David Rikl 6-4 6-1. Umpiry, "Thomas Muster vs David Rikl — San Marino Semi-final", https://umpiry.com/match/1993-08-09/muster-vs-rikl-san-marino-sf?utm_source=cite (as of 9 August 1993).