Chicago, IL (BoxingGurus.com) - This Saturday night at the Mandalay Bay Resort & Casino on HBO, Floyd Mayweather Jr. (28-0, 20 KO) will get a chance to prove some of his critics wrong and show he is the best Lightweight in the world. Mayweather Jr. won a controversial decision over Jose Luis Castillo (46-5-1, 42 KO) in their first fight on April 20, 2002. He won 116-111, 115-111 and 115-111 on the official scorecards, but the CompuBox punchstats were heavily favored toward Castillo.

“He took my belt, but not my pride. He knows who won the first fight,” Castillo said.

This fight was scheduled to take place on October 5th, but Castillo had injured his ankle during training and the fight was postponed.

Mayweather could have just turned his focus elsewhere and gone after a lesser fighter, but the true champion he is, Mayweather waited for Castillo and gave him the immediate rematch Castillo deserved.

“I’m a warrior and I have absolutely no problems fighting him again,” Mayweather said.

In another televised bout, top Heavyweight contender Wladamir Klitschko (39-1, 36 KO) will face another top contender Jameel McCline (28-2-3, 16 KO) in a fight that has huge title implications involved. Klitschko is in line to get a title shot, if he continues winning, with Lennox Lewis sometime in 2004, but McCline could take that spot with an upset victory here.