This tennis player's outburst became something of a catchphrase, after his 1981 attack on an umpire over a disputed line call at Wimbledon, saying "You cannot be serious!"

McEnroe was disqualified from the 1990 Australian Open for swearing at a referee.

Watch this montage of McEnroe's worst outbursts – there is over five minutes worth!

(Warning, some material contains strong language)