The association overseeing professional boxing in Britain suspended heavyweight boxer Tyson Fury's licence on Thursday.
British Boxing Board of Control (BBBC) general secretary Robert Smith said that the decision was made pending an investigation into anti-doping and medical issues.
Fury had earlier put an end to his 11-month reign as world champion with the announcement that he would be vacating his WBO and WBA titles "to fully focus on his medical treatment and recovery".
The 28-year-old has not fought since beating Ukrainian Wladimir Klitschko to win the titles in November 2015 and has since admitted taking cocaine to battle depression.
Image: Tyson Fury
Photograph: Kai Pfaffenbach /Reuters