• Boxer superimposed own head on to image from film with piles of cocaine • Fury reported to have tested positive for cocaine this week

Tyson Fury has posted a cryptic tweet amid reports of a positive test for cocaine, putting his head on the body of Al Pacino’s Tony Montana, one of the actor’s most famous roles.

So far, the world heavyweight champion’s camp has refused to comment on the claims from ESPN, but the fighter, who has 470,000 followers on Twitter, shared an image from the film Scarface, which shows the main character, Montana, sitting with a pile of cocaine on a table in front of him. Fury superimposed his face on to the picture, with the hashtag #Tysonmontana, which did little to clear up the confusion surrounding the reports.

On Friday, ESPN reported that Fury’s A sample from a random urine test had tested positive for the substance benzoylecgonine, the central compound found in cocaine. The sample was given on 22 September, in Lancaster, through the Voluntary Anti‑Doping Association.

A spokesman for Fury’s promoter, Hennessy Sports, declined to discuss the ESPN claims and Vada said they would not be commenting on the story and that they “do not release results publicly unless requested by the athlete”. A Ukad spokesperson said: “UK Anti-Doping will not discuss or disclose information relating to cases until due legal process has been completed.”

Last week, Fury, who holds the WBA and WBO world titles, pulled out of his proposed rematch with Wladimir Klitschko, arranged for 29 October, with his camp citing mental health issues.