Floyd Mayweather complained between rounds that Robert Guerero was rabbit punching through the first three rounds of the fight.
As they came out for round four, Mayweather seemed to be moving toward taking the fight over a bit as he had the spacing back where he was comfortable.
As Guerrero tried to get in Mayweather shoved him off and then went to the center of the ring where he drilled Robert with a hard punch that snapped his head back. Floyd also began walking out of corners, keeping the fight right over the Corona logo in the center of the canvas as much as possible.
With Mayweather's success, Guerrero's relentless nature began to recede and Floyd took advantage, landing hard straight rights between Guerrero's gloves.
Later in the round it was Guerrero who pushed Floyd into the ropes and had a brief moment of success before Floyd slid out the side.
Round: 10-9 Mayweather
Fight: 40-36 Mayweather
We'll have more, including complete results and analysis for the main event at our Mayweather vs. Guerrero Live Results Story Stream.