Paul Haarhuis defeated Thomas Muster 5-7 6-3 7-6 in the Hamburg round of 32 on clay. The upset overturned the form book — Thomas Muster came in leading the head-to-head 2–0, defending last year's round of 64. Paul Haarhuis claimed a first win over Thomas Muster in three meetings, narrowing the head-to-head to 2–1.
Haarhuis P. came through in three sets.
Clay: level 1–1 · Hard: Muster T. leads 1–0
Paul Haarhuis beat Thomas Muster 5-7 6-3 7-6(1). Umpiry, "Paul Haarhuis vs Thomas Muster — Hamburg Round of 32", https://umpiry.com/match/1992-05-04/haarhuis-vs-muster-hamburg-r32?utm_source=cite (as of 4 May 1992).