SYDNEY (AFP) - Sprint legend Usain Bolt was stunned on Monday (Oct 15) after being handed a drug testing notice despite retiring from athletics and having no professional contract as he bids to launch a football career in Australia.

The 100m world record-holder quit athletics last year and is yet to be offered a deal by Australia's Central Coast Mariners, where he is currently on trial.

"So guys I've retired from track and field looking to become a footballer but look at this," Bolt said via an Instagram video as he zoomed in on the notice.

The demand for the out of competition test - to collect urine and blood - appears to have been issued by Football Federation Australia.

"How am I going to get a drug test today? I'm not even a professional footballer yet. Seriously," said Bolt.

"So I asked the lady, 'Why am I getting drug tested when I haven't signed for a club yet?' and she said they told her I'm an elite athlete so I have to get tested. Okay then." Despite his displeasure, it appears the Australian Sports Anti-Doping Authority guidelines mean he is eligible to be tested.

Their legislation defines an athlete as a "person who competes in sport" if "the sport has an anti-doping policy".

The eight-time Olympic champion, who dominated sprinting after taking double individual gold at the Beijing Olympics in 2008, is now bidding to become a professional footballer.

He made his case on Friday by scoring two goals for the Mariners in a pre-season friendly.

The superstar, a massive Manchester United fan, has been handed a chance to train with the A-League side for an indefinite period in order to pursue his dream.