Coleman served an 18-monh ban for claims of failing to take a third test, something he protested.
Christian Coleman has said it was injustice for his missed third anti-doping test in 2019 leading to his evental 18-month ban.
In August 2019, one month before the World Athletics Championships, the United States Anti-Doping Agency temporarily banned Coleman under anti-doping whereabouts rules. These regulations prevent athletes from missing three drug tests in a 12-month period, which Coleman allegedly had.
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The US sprinter successfully appealed the decision, allowing him to compete at the World Championships, but it was then found he had missed yet another drug test and he received an 18-month ban. Coleman claimed that one of the missed tests had taken place when he was out Christmas shopping 'five minutes away', and insisted the testers had not bothered to call him to see where he was.
“I think the attempt on December 9 was a purposeful attempt to get me to miss a test,” he said on social media as reported by TalkSport. “I’ve been contacted by phone literally every other time I’ve been tested… why would the Athletics Integrity Unit tell him not to call me?!”
Coleman added: "This isn’t justice for anybody. Not me, not them, not the sport, who wins here? I am willing to take a drug test every single day for the rest of my career for all I care to prove my innocence.”
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Coleman, who won 100m gold at the World Championships in Doha in 2019, was first provisionally suspended in June 2020 after missing a third test in December 2019.
The AIU investigation into his rule violations said there was no suggestion he had ever taken a banned substance. However, Coleman's attitude towards his anti-doping obligations was described as entirely careless, perhaps even reckless by the AIU.