David Rikl defeated Marcelo Filippini 6-4 6-4 in the Prague round of 16 on clay. The upset overturned the form book — Marcelo Filippini came in defending last year's round of 32.
Rikl D. took it in straight sets.
David Rikl beat Marcelo Filippini 6-4 6-4. Umpiry, "David Rikl vs Marcelo Filippini — Prague Round of 16", https://umpiry.com/match/1992-08-10/filippini-vs-rikl-prague-r16?utm_source=cite (as of 10 August 1992).