Floyd Mayweather vs Marcos Maidana Live Stream, Replay: Watch Boxing Online (Showtime PPV Schedule)

Floyd Mayweather Jr. will fight Marcos Maidana on Saturday night in a massive Showtime PPV event that will see both fighters put belts on the line. Tonight's boxing event has a number of big undercard fights too, with Britain's Amir Khan fighting New York's Luis Collazo. The main fight card, consisting of four top fights, will start at 9 p.m. ET and can be watched on TV on Showtime PPV, or the action can be watched online through live stream (details below).

(Photo: REUTERS/Steve Marcus)Floyd Mayweather Jr. of the U.S. answers questions during a news conference following his fight against Victor Ortiz, also of the U.S., at the MGM Grand Garden Arena in Las Vegas, Nevada September 17, 2011. Mayweather Jr took the WBC welterweight title from Ortiz with a controversial fourth-round knockout on Saturday that prompted an angry response from the crowd and raised questions about his conduct in the ring.

Some have said that Mayweather may be distracted by the various events surrounding him over recent weeks and months. However, the undefeated champ has insisted he is fully focused on the fight tonight, which takes place at the MGM Grand Garden Arena in Las Vegas.

Earlier this week it was revealed on Showtime's All-Access reality show that Mayweather's longtime fiancée, Chantal Jackson, was pregnant with Mayweather's twins, but allegedly got an abortion without informing Mayweather first. The pair have since split, reportedly due to the shocking decision to abort the twins.

Mayweather though knows he has a big night tonight and is looking towards it with his usual professionalism.

After the weigh-in, where Mayweather hit 146 pounds – a pound below the maximum weigh-in weight for the Welterweight fight, he said, "My job is to go out there and do what I do best. I perform better under pressure. I look forward to going out there and being Floyd Mayweather and taking my time, keeping my composure and doing what I do best.

He insisted he was not fazed by the pressure: "Pressure. I love it. I love it. The main thing is, as long as God loves me, I'm OK."

There were nearly 10,000 people at the weigh-in event for the fight and was an event in itself. Fans were also able to witness another controversy unravel, as Mayweather's camp rejected the 8-ounce gloves Maidana's camp had selected for him to wear, saying the gloves did not have enough padding in the knuckle area.

READ MORE: Floyd Mayweather Accuses 'Selfish' Ex-Fiancee Shantel Jackson of 'Killing' Their Twin Babies in Abortion Revelations

Maidana is known as a big puncher and has claimed 31 knock outs from his 35 wins through his career. In comparison Mayweather has 26 knock outs from his 45 wins. However, Mayweather is of course undefeated, where as Maidana has lost three bouts through his professional career.

Tonight's massive fight will be at the top of a four fight main card that starts at 9 p.m. ET on Showtime PPV. Showtime will also be showing replays of the fight over the coming days.

Here is the full fight schedule for tonight:

Floyd Mayweather (45-0; 26 KOs) vs. Marcos Maidana (35-3; 31 KOs) - Welterweight (147 lbs.)

Amir Khan (28-3; 19 KOs) vs. Luis Collazo (35-5; 18 KOs) - Welterweight (147 lbs.)

Adrien Broner (27-1; 22 KOs) vs. Carlos Molina (17-1-1; 7 KOs) - Junior Welterweight (140 lbs.)

J'Leon Love (17-0; 10 KOs) vs. Marco Antonio Periban (20-1-1; 13 KOs) - Super Middleweight (168 lbs.)