Frederic Niemeyer defeated Michael Kohlmann 7-6 6-4 in the Australian Open qualifying round of 128 on hard. The upset overturned the form book — Michael Kohlmann came in defending last year's round of 128.
Niemeyer F. took it in straight sets.
Frederic Niemeyer beat Michael Kohlmann 7-6(5) 6-4. Umpiry, "Frederic Niemeyer vs Michael Kohlmann — Australian Open Qualifying Round of 128", https://umpiry.com/match/2000-01-17/kohlmann-vs-niemeyer-australian-open-q128?utm_source=cite (as of 17 January 2000).