Thursday 16 February 2017 14:15, UK
Nesta Carter has appealed against the ruling which saw Jamaica's 4 x 100m relay team - including Usain Bolt - stripped of their Beijing 2008 Olympic gold medal.
His lawyer Stuart Stimpson has confirmed to Sky Sports News HQ that the appeal was filed on Thursday.
It was sent to the Court of Arbitration for Sport (CAS) electronically and hard copies will get there on Friday.
Carter was disqualified last month after the reanalysis of his frozen 2008 samples tested positive for methylhexaneamine.
The team, which included Carter, Michael Frater, Asafa Powell and Bolt, have all now returned their medals to the International Olympic Committee .
Bolt lost his 'treble-treble' of 100m, 200m and 4x100m relay victories from the Beijing, London 2012 and Rio 2016 Olympics as a result of the ruling.
