Floyd Mayweather Jr has been forced to postpone his tour of Britain after encountering a visa problem.

The 37-year-old was scheduled to embark on a nationwide tour encompassing Bolton, Leeds and London, with fans of the fighter paying upwards of £200 for a ticket to his speaking events.

However, Mayweather, who is poised to face a yet-to-be named opponent in September, reportedly has to cancel the tour until October after a visa issue prevented him from boarding a London flight.

It remains unclear as to why the undefeated boxer - who served a two-month prison sentence back in 2012 - was prohibited from boarding the flight.