Floyd Mayweather: break from boxing has not left me vulnerable to Robert Guerrero My main focus is to win. I focus on winning and I'm always going to control the tempo of any fight because of my experience. Mayweather starts a big favourite against Californian Guerrero, who boasts 31 wins from 35 fights, including a solitary loss to Gamaliel Diaz in a featherweight fight in 2006. But Guerrero is determined to shatter what he sees as Mayweather's fake aura of invincibility, and says his strong faith and his own battle against adversity following his wife's diagnosis with leukemia will help him score a momentous upset. Guerrero said: "You get a lot of people out there that think Floyd's like a god, that's he's unstoppable and there's no blueprint to beat him. But being a big believer in God, there's a blueprint for everybody. There's a way to conquer anything. This is the moment, with a guy that nobody thinks can be beaten, saying he's unstoppable and the best ever. God's put me in this position for a reason and he's groomed me to take over in boxing.