Mariano Zabaleta defeated Michael Kohlmann 7-5 6-3 in the Hamburg qualifying round of 32 on clay. The upset overturned the form book — Michael Kohlmann came in leading the head-to-head 1–0. Mariano Zabaleta claimed a first win over Michael Kohlmann in two meetings, levelling the head-to-head at 1–1.
Zabaleta M. took it in straight sets.
Mariano Zabaleta beat Michael Kohlmann 7-5 6-3. Umpiry, "Mariano Zabaleta vs Michael Kohlmann — Hamburg Qualifying Round of 32", https://umpiry.com/match/2002-05-13/kohlmann-vs-zabaleta-hamburg-q32?utm_source=cite (as of 13 May 2002).