John McEnroe is undoubtedly one of the most controversial figures in the tennis world, having forged one or two rivalries during his playing career.
McEnroe turned to coaching after retiring, while the seven-time Grand Slam champion has also been heavily involved in commentary.
Jimmy Connors found McEnroe tough to play against, with the American duo having played out an intriguing rivalry during their superb careers.
Former ATP Tour number one McEnroe ended his career with a total of 77 singles titles, four of which arrived at the US Open.
It was on home soil where he enjoyed the majority of his Grand Slam titles, with his other three arriving at Wimbledon.

John McEnroe insulted by photographer in US Open farewell
In his final ever appearance, however, he endured a negative experience, with McEnroe not happy with a photographer during his 1992 US Open match against Jim Courier.
Explaining the altercation after the fourth round match, which he lost in straight straights, McEnroe told reporters: “Just simply asked him to stop, you know, I am… same thing I have been asking, just simply to ask to change his camera on the changeovers, that is all.
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“And I sort of find it insulting to… as I am asking him to do it, he continues to change it. And so, I just felt that was really inappropriate.
“And then he flipped off at the referee and they had him removed. So I mean, I don’t think… it is not why I lost the match. I wish I could blame it on the guys changing the cameras.
“I think it’s a courtesy, no big deal. People choose not to do it. We have to play on, but I think it is a courtesy that should be adhered to.”

John McEnroe bows out of 1992 US Open with loss to Jim Courier
McEnroe was the 16th seed at his final ever US Open appearance, which was also his last Grand Slam singles appearance.
But after beating Michiel Schapers, Diego Nargiso and Richard Fromberg, he was given the tough task of facing Courier in the fourth round.
Courier was the top seed and indeed the world number one, and showed his class with a 6-2, 6-2, 7-6(7-1) win.
The defeat signalled the end of McEnroe’s phenomenal run of 16 consecutive US Open singles appearances.
Away from the action, however, McEnroe continued to express his disapproval of the photographer, having been told he claimed it wasn’t him but another photographer.
“He was actually changing the camera after I asked him, so I mean, if he is even beginning to claim that it wasn’t him, that is just outright… that is not fact,” said McEnroe.
“I don’t know why he couldn’t have said, okay, I asked him, and wanted to get his name in the paper, I guess.”
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