Alex Corretja defeated Emilio Sanchez 3-6 6-2 6-2 in the Hamburg round of 64 on clay. The upset overturned the form book — Emilio Sanchez came in defending last year's round of 32, but Alex Corretja had been the form player, winning 1 of their last 5 on clay.
Corretja A. came through in three sets.
Alex Corretja beat Emilio Sanchez 3-6 6-2 6-2. Umpiry, "Alex Corretja vs Emilio Sanchez — Hamburg Round of 64", https://umpiry.com/match/1992-05-04/corretja-vs-sanchez-hamburg-r64?utm_source=cite (as of 4 May 1992).