Floyd Mayweather Jr attends Chris Brown's birthday celebrations in Las Vegas

Floyd Mayweather Jr partied in Las Vegas at the 26th birthday celebrations of American popstar Chris Brown on Tuesday.

The pound-for-pound boxer was spotted partying for the first time since beating Manny Pacquiao on points at the MGM Grand Garden Arena last Saturday.

The 38-year-old is believed to have earned upwards of £130m for the fight, and it appears that he spent some of that cash on a night out at luxury club Drai's.

Brown selected the club to host his birthday, which falls on Cinco de Mayo, and Mayweather was spotted with a large entourage, who enjoyed unlimited glasses of champagne, according to the Daily Mail.

Meanwhile, Mayweather is reportedly being sued for £13m by his ex-girlfriend Josie Harris, who is the mother to three of his children.