Mikael Pernfors defeated John McEnroe 1-6 6-4 5-7 4-2 in the Australian Open round of 16 on hard.
Pernfors M. won the match.
Mikael Pernfors beat John McEnroe 1-6 6-4 5-7 4-2. Umpiry, "Mikael Pernfors vs John McEnroe — Australian Open Round of 16", https://umpiry.com/match/1990-01-15/mcenroe-vs-pernfors-australian-open-r16?utm_source=cite (as of 15 January 1990).