https://news.sky.com/story/great-bri...-test-12545376
Ujah ran the first leg in the 4x100m relay final in Tokyo and the team, also featuring Zharnel Hughes, Richard Kilty and Nethaneel Mitchell-Blake, just lost out on the gold medal to Italy.
Great Britain have been stripped of their silver medal in the men's 4x100m relay at the 2020 Tokyo Olympics after sprinter CJ Ujah tested positive for a banned substance.
The British quartet missed out on the gold medal in Japan, with Italy finishing first but Ujah tested positive for two banned substances on 6 August.
His drug test found traces of ostarine and S-23 in his system, both of which are banned substances.
A statement issued by the Anti-Doping Division of the Court of Arbitration for Sport (CAS ADD) said Ujah did not challenge the violation but argued he had "not knowingly or intentionally doped, suggesting that the source of the prohibited substances could have been the ingestion of a contaminated supplement."
The statement added: "The CAS ADD sole arbitrator issued the present decision in which she determined, to her comfortable satisfaction, that an anti-doping rule violation had been committed."
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The CAS ADD said that it has requested World Athletics to consider further action against Ujah, including a ban.
Ujah ran the first leg of the sprint relay that saw his team including Zharnel Hughes, Richard Kilty and Nethaneel Mitchell-Blake narrowly beaten by the Italians.