sentences:  Guerrero won the fight by TKO in the 8th round.After the bout, Guerrero expressed his interest in fighting Mexican champion Juan Manuel Márquez.On July 31, 2010, Guerrero moved up to the junior welterweight division and faced Cuban fighter Joel Casamayor on the undercard of the Marquez vs. Diaz pay-per-view at the Mandalay Bay in Las Vegas.