Fury: I'll retire after Klitschko

World heavyweight champion Tyson Fury says he is "100 per cent" sure he will retire after his rematch with Wladimir Klitschko.

Fury defeated the formidable Klitschko on a unanimous points decision in Dusseldorf last November to claim the WBA, IBF (which he was later stripped of) and WBO heavyweight titles.

Klitchsko subsequently activated a rematch clause in his contract and the duo will meet again in Manchester on July 9.

However, Fury has recently expressed a degree of disillusionment with boxing and the outspoken 27-year-old announced on Twitter on Sunday that his next fight will be his last.

"I set off today for what promises to be a very hard eight weeks training camp," Fury wrote on Sunday afternoon.

"This will be my best fight, then I'll retire, 100 per cent."

And Fury later posted a photo of one his children and added: "This is the reason I'm retiring after my next fight, to spend time with these guys."

Were Fury to retire following his bout with Klitschko, it would rule out the prospect of him facing fellow Brit Anthony Joshua, the IBF world champion, in what would be an eagerly-awaited showdown.

American WBC title-holder Deontay Wilder has also been mentioned as a possible future opponent for Fury.