What tennis player was thrown out of the Australian Open in 1990?

Answer 1

John McEnroe. He was disqualified from the 1990 Australian Open in his fourth round match against Mikael Pernfors for Code of Conduct violations.

McEnroe's ejection was the result of new ATP Conduct regulations that had just been updated that year. Previously, players were defaulted after their fourth violation; as part of a drive to improve tennis' image, the limit was reduced to three. In his Australian Open match, McEnroe received his first violation when he swore at a lineswomen. He was given a second warning when he destroyed a racquet on the court. Assuming he still had a third chance left, he decided to vent by verbally abusing the court umpire; under the new rules, however, the third offense resulted in his forfeiture of the match.

McEnroe's opponent, Pernfors, lost in his next round match against Yannick Noah, 3-6, 5-7, 2-6. It was his best result at the Australian Open.