Great Britain have been stripped of their silver medal in the 4x100 metre relay at last summer's Tokyo Olympics after team member Chijindu Ujah was found to have committed a doping violation.
The British team just lost out to Italy for the gold medal in Japan, with Ujah testing positive for the prohibited substances ostarine and S-23 after the race on 6 August.
A statement issued by the Anti-Doping Division of the Court of Arbitration for Sport (CAS ADD) on Friday said Ujah did not challenge the anti-doping rule 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."
