World Heavyweight Champion Tyson Fury was refused entry to the US yesterday when he attempted to board a flight in Manchester.
It is understood he was denied boarding due to his links with Daniel Kinahan.
In April, the US government announced sanctions on people connected with the Kinahan organised crime group.
Mr Fury has denied having any business dealings with Kinahan.
Kinahan, who has been named in the High Court as the controller and manager of the Kinahan crime organisation, has been placed on an Office of Foreign Assets Control (OFAC) list, which is a list of the US Treasury Department.
Mr Fury has previously revealed that Kinahan was helping broker a potential heavyweight clash with Anthony Joshua and had made an agreement.
The fight did not materialise.
He was pictured in Dubai earlier this year with Kinahan.
Mr Fury’s representatives have been contacted for comment.