Filipino legend Manny Pacquiao challenges Lucas "The Machine" Matthysse for the World Boxing Association welterweight belt on Sunday knowing defeat could lower the curtain on one of the greatest careers in boxing history.
Pacquiao, 39, faced calls to retire from friends, family and even his Hall of Fame trainer Freddie Roach when he lost the WBO belt to journeyman Australian Jeff Horn a year ago.
A second successive defeat, this time against the dangerous Argentine at Kuala Lumpur's Axiata Arena on Sunday, could see the veteran "National Fist" hang up his gloves for good.
But victory for Pacquiao (59-7-2, 38 KOs), who has won world titles in an unprecedented eight weight divisions in a glittering 23-year career, would extend his legendary status and his life in the ring beyond his 40th birthday in December.
"I am not saying it will be the last (fight), but it will be the basis to think about (whether) to continue or not," Pacquiao told AFP at his training camp.
But "Pac-Man's" conditioning coach Justin Fortune thinks the world will see "the old Pacquiao" return and silence those who question whether his aging body still has the ability to compete against the world's best.
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Pacquiao is going for his 60th victory since turning pro in 1995, but despite winning 38 of his first 47 fights by knockout, he has not stopped an opponent in nine years.
"He looks like the old Pacquiao," declared Fortune of the boxer who is also an elected senator in the Philippines and is tipped one day to run for president.
"His metabolism is ridiculous. He's a freak." Matthysse (39-4, 36 KOs) paid tribute to Pacquiao but warned that his admiration for one of the world's greatest pound-for-pound fighters would not stop him from taking his belt back to South America.
"He is a great champion but he still hasn't faced 'The Machine'," Argentina's Matthysse told a pre-fight press conference.
"If he decides to retire after I beat him then that is his decision. I am here to defend my title."
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