Arturo Gatti vs. Floyd Mayweather Jr., billed as Thunder & Lightning, was a professional boxing match contested on June 25, 2005, for the WBC super lightweight championship.

After a tough trilogy with Mickey Ward, Gatti earned a shot at the vacant WBC super lightweight (AKA light welterweight) championship, winning the title on January 21, 2004, with a unanimous decision victory over Gianluca Branco.

In his light welterweight debut, Mayweather had Corley down on the canvas no less than seven times (though only two were declared official knockdowns) and cruised to an easy, lopsided unanimous decision that made him the number one contender to Gatti's title.

Mayweather, however, crashed a Gatti press conference, referring to him as a "paper champion" and lampooning his struggle to make weight by loading food on a plate.

[8] Things would only go downhill for Gatti as Mayweather continued to overwhelm the champion with his quickness and hand speed, landing combinations at will.