Tyson Fury must spend part of his build-up to next month's projected world heavyweight title re-match with Wladimir Klitschko fighting to clear his name in front of an anti-doping panel.
The two parties announced on Tuesday that they will meet again in Manchester on October 29, 11 months after Fury scored a unanimous decision over the Ukrainian last November.
But first Fury will have to appear before the independent panel after being suspended by the UK Anti-Doping agency for a positive drugs test last year.
The ban was subsequently lifted and in line with UK Anti-Doping agency rules, Fury's case is now set to be fast-tracked in order that his position can be clarified before the scheduled bout with Klitschko.
Although unwilling to comment on the specific case, the UK Anti-Doping agency said in a statement to Press Association Sport: "In circumstances where a provisional suspension has been lifted, then UKAD takes the position that matters should be fully determined before an athlete that has committed an alleged anti-doping rule violation competes again.
"This is to preserve the integrity of the competition and sport in general."
Fury became the first boxer to defeat Klitschko in 11 years when he won his WBA, WBO, IBO and IBF belts by virtue of an unanimous decision in Germany.
He subsequently was stripped of the IBF version of the belt for agreeing to an immediate rematch with Klitschko and refusing to face that organisation's mandatory challenger.
An initial date for a rematch in July was scrapped when Fury claimed he had an ankle problem, prompting a threat from the Ukrainian's camp to go to court to force a second bout.
Shortly after that postponement, the Sunday Mirror reported the 28-year-old had been the subject of a doping investigation last year - something the heavyweight strenuously denied in a statement.
In August UK Anti-Doping revealed Fury had been provisionally suspended in June over the presence of a prohibited substance, which was subsequently lifted.
Fury has been back in training since late August and alluded to the October 29 date that has now been confirmed in numerous social media posts.
Upon the announcement of the rematch with Fury, Klitschko wrote on Twitter on Wednesday: "Finally the rematch is fixed. I'll remedy my mistake on Oct. 29 at Manchester Arena. See you there! #NowMoreThanEver."