Freddie Roach, the trainer of eight division world champion Manny Pacquiao, expects his boxer to score a knockout victory on Saturday night, when the Filipino superstar collides with WBA welterweight world champion Keith Thurman.

The fight takes place at the MGM Grand in Las Vegas.

Pacquiao (61-7-2, 39 KOs) will attempt to become the first man to topple the undefeated record of Thurman (29-0, 22 KOs).

Thurman believes Pacquiao, at 40-years-old, doesn't have a lot left in the tank.

He predicts that Pacquiao will get knocked out within six rounds of the fight.

Roach believes it's Thurman who will get knocked out, and predicts that it will happen around the ninth round.

“I don’t think it will end early. Both are tough guys and usually are in long distance fights so I think Manny’s gonna knock him out about the ninth round,” Roach said to The Inquirer.

Roach is convinced that Pacquiao’s hand speed is will be too much for Thurman.

“I think Thurman can’t handle Manny’s speed and Manny’s speed is continuous, it doesn’t go away halfway through the fight,” Roach said.

Thurman is regarded as one of the best fighters in the welterweight division - with wins over top fighters like Shawn Porter, Danny Garcia, and several others. Pacquiao is easily the biggest fight of Thurman's career.

But, Thurman looked lackluster back in January when he snapped a two-year layoff - with a twelve round decision over Josesito Lopez.

Pacquiao was also in action in January, when he won a twelve round unanimous decision over four division champion Adrien Broner at the MGM Grand. Even at 40, Pacquiao had not lost a step and controlled nearly every moment of his fight with Broner.