03/09/2015 3:00 PM AEST | Updated 15/07/2016 12:51 PM AEST

Shane Warne Sends Nick Kyrgios Open Letter On Facebook

Max Mumby/Indigo via Getty Images
ASCOT, UNITED KINGDOM - JULY 27: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Shane Warne fools around with his glass of drink as he and Elizabeth Hurley attend the Betfair Weekend, featuring the King George VI and Queen Elizabeth Stakes, at Ascot Racecourse on July 27, 2013 in Ascot, England. (Photo by Max Mumby/Indigo/Getty Images)

Shane Warne -- cricket legend, notorious lad about town, poker player, taker of diet pills -- has written an open letter to tennis player Nick Kyrgios telling him to clean up his act.

Warne, who was fined several thousand dollars for giving information to an Indian book maker in 1994, took to Facebook to ask the controversy-plagued tennis star to shape up.

"We all realise you're only 20 & have a lot to learn buddy. But please don't waste your talent, everyone in the world, especially us Australians want to respect u," Warne wrote.

"Remember respect is way more important than being liked, u need to respect the game of tennis & yourself."

(Getty/Max Mumbo)

Dear Nick Kyrgios, We all realise you're only 20 & have a lot to learn buddy. But please don't waste your talent,...

Posted by Official Shane Warne on Wednesday, 2 September 2015

Warne, with a long list of affairs and scandals to his name including a sex romp with British models caught on a camera hidden in his hotel room, scolded Kyrgios over his conduct and character.

"We all make mistakes, but it's how we learn from them & the way we conduct ourselves when we lose that shows true character," he continued.

Warne, who was banned from cricket for a year after testing positive to a banned diuretic, said Australia expected better of its sporting stars.

(Fairfax Media/Supplied)

"You're testing our patience mate, show us what you're made of & how hungry you are to be the best in the world, it's time to step up & start winning, no excuses. No shame in losing, but show us you will never give up, that you will give it everything to be the best you can be, respect is earned not given!"

Warne said Kyrgios had to up his game.

"I believe in you & know you can do it, but now's the time my friend."

Kyrgios has not yet responded publicly.