Floyd Mayweather vs Andre Berto: what time does it start and what channel is it on?

The bout takes place during the early hours of Sunday morning

The Mayweather vs Berto fight poster (instagram.com/floydmayweather)

Floyd Mayweather takes on Andre Berto in Las Vegas in the early hours of Sunday morning, in what he says is his final fight. The ring walk is expected to start from around 3.30-4am (BST).

The names of Amir Khan, Keith Thurman and Gennady Golvkin were mooted, but instead the unbeaten Mayweather fights Berto, who is a former world champion but has lost three of his last six fights.

It will be Mayweather's 49th fight, and the final bout of the six-fight deal he agreed with American broadcaster Showtime in February 2013.

If he wins, the 38-year-old's record will equal that of legendary 1950s American heavyweight Rocky Marciano, who retired from the sport without suffering a professional defeat.

Last month, Mayweather hit out at those criticising him for picking Berto in what looks to be his final fight.

"He's a young, strong fighter who is hungry to take down the best - 48 have tried before and on 12 September, I'm going to make it 49," Mayweather said.

"How many championships has Khan won, two. Berto has won two also."

TV: BoxNation

Start time: 3.30-4am (BST) Sunday 13 September

Venue: MGM Grand Garden Arena, Las Vegas