Mayweather, McGregor wrap up profane PR tour in London

Floyd Mayweather and Conor McGregor wrapped up the four-day promotional tour for their boxing match in Las Vegas in August with another foul-mouthed press conference, this time in front of thousands of fans at the Wembley Arena in London.

The undefeated American Mayweather and the UFC lightweight champ McGregor of Ireland traded many of the same crude jibes used at previous events in Los Angeles, Toronto and New York.

Celebrating his 29th birthday and wearing another sharp suit, McGregor once again spoke first, and he wasted no time firing insults at Mayweather and his team as he strutted around the three-sided boxing ring set up for the event.

"In six weeks I'm gonna sleep this fool, and when I sleep him, I'm going to bounce his head off the canvas as well," a jubilant McGregor told a noisy, partisan crowd mostly made up of his fans.

After both sides added to the pile of homophobic, racial and misogynistic slurs aired all week with another round of profanities, the two finally squared off before taking a handful of questions from media members that eased the tension somewhat.