World heavyweight champion Tyson Fury has denied ever taking performance enhancing drugs following allegations of cheating.
It has been reported in the British media that Fury is under investigation for the use of nandralone, a substance which helps muscle growth and is on boxing's banned list.
Earlier this week Fury pulled out of his first world title defence, a rematch with the man he took the belts off - Wladimir Klitschko due to an injured ankle.
That fight was due to take place on July 9 and has now been postponed until October 29 - though doubts must surely hang over it in light of these allegations.
In a statement released on Sunday, Fury's camp said: "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 title against Wladimir Klitschko in October."
UK Anti-Doping - which the Sunday Mirror reported was overseeing the investigation - spokeswoman Sophie Ashcroft 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."
The doping allegations are the latest controversy in a career which has frequently attracted negative publicity.
In the build-up to November's defeat of Klitschko - which remains among the finest any British fighter has secured - he expressed extreme views on homosexuality and paedophilia.
