Golden State Warriors star Draymond Green is in hot water again after a picture of his penis was seen by thousands of followers on the social media app Snapchat.

Travelling with the United States basketball team to Rio, Green accidentally uploaded the photo to the "My Story" function instead of sending it privately.

He removed the photo promptly and tweeted that he'd been the subject of a hack.

However, he later apologised and admitted he had made a mistake saying, "We're all one click away from placing something in the wrong place."

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It caps a tumultuous year for the NBA sharpshooter who just last month faced a misdemeanour charge after an incident on a college campus in Michigan.

He was also the subject of much criticism in the NBA playoffs with his continual confrontations with Kiwi Steven Adams.

Green irked Oklahoma City Thunder fans when he kicked the New Zealander between the legs twice during the Western Conference Finals.

Green is hoping to have his misdemeanour charge resolved before the 2016 Olympics.