Fury last week pulled out of his proposed rematch with Wladimir Klitschko, scheduled for October 29, due to undetermined health concerns, sparking speculation he could be stripped of his belts.
It has subsequently been claimed that Fury failed a drugs test carried out by the Voluntary Anti-Doping Association (VADA) on September 22.
VADA declined to comment on the results of any test when contacted by Omnisport on Friday, but Fury caused a stir with an image posted on social media on Saturday.