At the 1990 Australian Open, tennis icon John McEnroe was disqualified from his fourth-round match, becoming the first player in the Open Era to be defaulted from a Grand Slam for triple court violations. This infamous incident occurred on January 21, marking a significant moment in tennis history.source https://timesofindia.indiatimes.com/sports/tennis/top-stories/australian-open-when-sachin-tendulkars-childhood-idol-became-the-first-to-be-disqualified-from-a-grand-slam/articleshow/126966491.cms