Tyson Fury's promoters say they are "baffled" by claims the world heavyweight champion is embroiled in a doping investigation.
A report by the Sunday Mirror alleged traces of a banned substance were discovered in a sample taken last year.
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But Fury's promoter Hennessy Sports has denied the allegations in a statement released on Sunday.
The statement read: "We are baffled by today's story in the Sunday Mirror. Tyson Fury absolutely denies any allegation of doping.
"He looks forward to recovering from his injury and defending his titles against Wladimir Klitschko in October."
Sophie Ashcroft, a spokesperson for UK Anti-Doping (UKAD) – which the Sunday Mirror reported was overseeing the investigation – said: "UK Anti-Doping does not discuss or disclose details of any cases until due legal process has been completed or a respondent chooses to put the information into the public domain.
"This is to protect the rights and privacy of all involved and to ensure that a case is not subjected to unnecessary prejudice.
"It is important to note that an anti-doping rule violation is only deemed to have been committed once the legal process, including any appeals, has been completed. At that point, details of a violation will be made available on the UKAD website."