Athletics legend and eight time Olympic gold medalist Usain Bolt has expressed surprise after being requested to give a blood and urine sample by Australia’s Anti-Doping Authority (ASADA) despite retiring from athletics, claiming that he is “not even a professional footballer yet.” Bolt who is currently on trial with the Central Coast Mariners in the A-League scored twice for the Central Coast Mariners on Friday and was handed a notice by the Australian Sports Anti-Doping Authority. The 32-year-old who is looking to turn into a full-time professional footballer after quitting athletics last year and is yet to be offered a deal by Australia's Central Coast Mariners, where he is currently on trial. The 100m world record-holder is not too happy at being at the centre of the authorities attention and took to Instagram on Monday to criticise their actions. “So guys I’ve retired from track and field looking to become a footballer but look at this,” Bolt said on the social media platform. How am I going to get a drug test today? I’m not even a professional footballer yet. Seriously.” “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”. Due to being registered with the club as a triallist, Bolt is indeed subject to drugs testing, however, the Jamaican’s trial period has now ended and it’s in the hands of the Central Coast Mariners as to whether he has a future at the New South Wales side. The 100m and 200m world record holder has been on trial with the A-League club since August and scored his first goal in a friendly on Friday. Bolt previously trialled with Borussia Dortmund and also played a match for Norwegian first division side Strømsgodset this summer where he wore a shirt with the number 9.58 in honour of his world record. Bolt did show that he has the goods, scoring twice in a trial match recently but it will definitely take a lot more from his side as he looks to one day play for his dream club Manchester United.