Mayweather vs Berto: Fight time, TV schedule, and how to watch online

Tonight on Showtime pay-per-view and various other outlets across the globe, Floyd Mayweather takes on Andre Berto in the main event from the MGM Grand Garden Arena in Las Vegas, Nevada, with the hype being that this will be the final fight of Mayweather's career.

Mayweather (48-0, 26 KO) is a massive betting favorite in this bout, as few if any give Berto (30-3, 23 KO) a serious chance at the upset. The undercard, however, has some better-matched fights, at least in terms of them being more competitive on paper.

In the main undercard bout, Rocky Martinez will rematch Orlando Salido with the WBO super featherweight title at stake. Martinez beat Salido on April 4 to lift the title belt. There will be another world title on the line when Badou Jack makes his first defense of the WBC super middleweight belt against George Groves, who is hoping the third time's a charm in world title fights. And in the pay-per-view opener, Jhonny Gonzalez will face Jonathan Oquendo in a 10-round super featherweight fight.

Here are the details on how to watch tonight.

Fight Time: 8:00 pm EST (main event likely to start around 11:00 pm EST)

Channels: Showtime PPV (USA), BoxNation (UK), Main Event PPV (AUS), RPC 4 (PAN)

Streaming: CBS.com PPV (USA)