Former undisputed heavyweight world champion Lennox Lewis, US TV personality Larry King and singer Samantha Mumba are among a host of celebrities taking to social media to catch what could be the biggest grossing fight yet, between boxer Floyd Mayweather and Mexico's Saul Alvarez.
American business magnate Elon Musk has flown to see boxer Floyd Mayweather take on Mexico's Saul Alvarez, on a private jet with Justin Bieber, according to his Twitter.
Venture capitalist Shervin Pishevar also joined Musk and his ex-wife Talulah Riley and his brother Kimbal.
Boxing journalist Steve Bunce has told ITV News that "people have fallen in love" with Floyd Mayweather and he believes that the American will be backed to the hilt when he takes on Mexico's Saul Alvarez in Las Vegas on Saturday night.
The WBA light middleweight title fight is being billed as the richest in history.
Alvarez has quickly emerged as arguably Mexico's biggest boxing star.
Despite his powerful body attack and reputation for being a solid, hard-hitter, he is the 11/5 underdog against Mayweather.
Tale of the Tape:
Age: 23, born July 18, 1990.
Birthplace: Jalisco, Mexico, where he still lives.
Record: 42-0-1 (30 KO).
Height: 5ft 9ins.
Weight: (not official weigh-in) 152.
Mayweather re-established his position at the top of the game last May with a unanimous decision win over Robert Guerrero. He has been world champion at 130, 135, 140, 147 and 154 pounds, and is 5/14 favourite to win against Alvarez.
Tale of the tape:
Age: 36, born February 24, 1977.
Birthplace: Grand Rapids, Michigan, USA. Now lives Las Vegas, Nevada.
Record: 44-0 (26 KO).
Height: 5ft 8ins.
Weight: (not official weigh-in): 152 pounds.
Reach: 72 ins.
Saturday's bout and its billing as the richest fight in history will see Floyd Mayweather attempt to unify his WBA light middleweight title against WBC 154-pound champion Saul 'Canelo' Alvarez at the MGM Grand Garden Arena in Las Vegas.
Pound for pound number one at 36, Mayweather is back in the ring for the second time in five months.
Canelo turned pro at 15 and wins with a hard-hitting style and a powerful body attack.
Alvarez signed with Golden Boy Promotions in 2010, and his impressive unbeaten record of 42, no losses and one draw rivals that of Mayweather on 44 wins, no losses and 26 Knock Outs.
Floyd Mayweather is currently serving a prison sentence for domestic violence and Khan will be waiting when he is released in a few weeks' time.
Floyd Mayweather Jr added the WBA Super World light-middleweight title to his tally with a unanimous points victory over Miguel Cotto in Las Vegas overnight.
Mayweather won by margins of 118-110 and 117-111 (twice) on the judges' scorecards to preserve his unblemished 43-fight record.
Attentions will once again turn towards the prospect pairing Mayweather with pound-for-pound rival Manny Pacquiao, but the 35-year-old American must first serve a three-month prison sentence after pleading guilty to a domestic violence charge.