Floyd Mayweather's straight right hand had taken over the fight against Robert Guerrero after five rounds. It was the single punch that Mayweather felt he could land whenever he threw it now that he had his timing worked out.
And he continued going back to it in round six, though Guerrero landed a nice counter shot of his own early in the round, as well as a jab.
Mayweather used a rare uppercut, just missing the jaw of Guerrero, but displaying something outside of what he had been throwing to this point.
Floyd's success with the right has shifted Guerrero into a much more defensive mode. He is still occasionally landing some solid shots or combinations in spurts, but the workrate just isn't even as Maywather is much more accurate and effective when he decides to throw punches.
Round: 10-9 Mayweather
Fight: 60-54 Mayweather
We'll have more, including complete results and analysis for the main event at our Mayweather vs. Guerrero Live Results Story Stream.