Ivo Heuberger defeated Noam Okun 6-4 6-4 in the Australian Open qualifying round of 32 on hard. The upset overturned the form book — Noam Okun came in defending last year's round of 128.
Heuberger I. took it in straight sets.
Ivo Heuberger beat Noam Okun 6-4 6-4. Umpiry, "Ivo Heuberger vs Noam Okun — Australian Open Qualifying Round of 32", https://umpiry.com/match/2001-01-15/heuberger-vs-okun-australian-open-q32?utm_source=cite (as of 15 January 2001).