Dana White

White: McGregor will become the biggest star on earth

UFC superstar McGregor will make his boxing debut in Las Vegas after luring Mayweather out of retirement for the blockbuster event.

Given Mayweather's 49-0 record the American has been installed as strong favourite for the fight, but McGregor's odds have continued to come in as the bout draws closer.

And UFC boss White believes McGregor is going to shock the world by knocking out his illustrious opponent, and in turn make him the "greatest combat sports star ever".

"To think Conor can't beat Floyd Mayweather is quite something," White told BBC Sport.