Manny Pacquiao and Keith Thurman both tipped the scales at 146.5 pounds ahead of their much-anticipated WBA world welterweight title clash.
Filipino icon Pacquiao on Friday smiled and waved to several thousand fans inside the MGM Grand Garden Arena as he faced off with undefeated champion Thurman for the final time before Saturday's bout.
"It's going to be a good fight," Pacquiao said from the stage.
"I want to prove something in this fight. It's all set for tomorrow," added Pacquiao, who was half a pound lighter for his last fight in January against Adrien Broner.
Thurman meanwhile was greeted by loud boos from an overwhelmingly pro-Pacquiao crowd.
"It is my time. This is one time. Manny Pacquiao ain't doing nothing to me, baby," Thurman said.
Pacquiao is attempting to capture Thurman's WBA "super" welterweight crown, regarded as the sanctioning body's most important championship belt in the division.
The 40-year-old will be climbing into the ring for the 71st time in what is seen as his most challenging contest since defeat to Floyd Mayweather in 2015's "Fight of the Century."