Men’s 100m champion Christian Coleman has been banned for two years after missing three drugs tests.
Coleman,24, will be banned until May 2022, forcing him to miss next summer Tokyo Olympics.
He was provisionally suspended in June after missing a third test in December 2019.
Athletes face a two-year ban if they have three violations of so-called “whereabouts” rules in a 12-month period.
He has 30 days to file an appeal to the Court of Arbitration for Sport (Cas).