Great Britain have been stripped of their silver medal in the men's 4-by-100 metre relay at the Tokyo Olympics after CJ Ujah failed a drugs test.
The sprinter claims he unknowingly took a banned substance in a "contaminated supplement", but accepts the Court of Arbitration for Sport's decision.
He's apologised to his team-mates - Zharnel Hughes, Richard Kilty and Nethaneel Mitchell-Blake.
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