London, June 15 : The original angry young man of tennis, John McEnroe, has said that British tennis star Andy Murray will have to keep his cool if he wants to win Wimbledon this year.

Thirty years after his infamous rant against a tennis official at Wimbledon, McEnroe, middle-aged but still spiky, is a content member of the establishment against which he railed so loudly.

This week, as he prepared for another stint in the BBC commentary box at the Championships, he recalled the start of that journey and explained why Andy Murray would be well advised to shake off his own occasional petulance.

"At the time it didn''t seem anything out of the ordinary," McEnroe said. "There was already a lot of pressure I''d put on myself because I felt like I should perhaps have won it already. [Borg beat him in five classic sets in the final the year before].

He added: "It was me against everyone there at the time, whether it was the press or the umpires."

He says that Murray does himself no favours when he lets his mood swings show on court. He is giving his opponents too much of himself. Martina Navratilova said the same thing at the weekend.

The Guardian quoted him, as saying: "You look at the yelling, and it doesn''t take someone like Einstein or Sigmund Freud to realise it isn''t helping him. I know that when you get that pent up and crazed, I can tell you from experience, it can be distracting at times. It cost me the match in the French Open when I lost to Lendl in the 1984 final, having led by two sets."

"In an ideal world, it would be a good idea if he didn''t do it. It seems like it''s hurt him - in my mind, but it''s easy for me to be a backseat driver. I don''t know if he''s directing it at his mum, but a couple of times my dad would be there and he''d be sort of calm. I would get so worked up and I''d be yelling at him: ''I''m out here laying it on the line and you''re sitting there .'' So I''d be all upset at him and start yelling at him and in some cases, dare I say it, cursing at him. I think there would have been a better way of getting myself motivated. There are other ways to fire yourself up without having to be on the edge of disaster," McEnroe said. (ANI)