Juan Manuel Marquez v Juan Diaz
Robert Guerrero (L) and Joel Casamayor trade blows in the eighth round of their junior welterweight fight at the Mandalay Bay Events Center July 31, 2010 in Las Vegas, Nevada. Guerrero won by unanimous decision.
(July 30, 2010 - Source: Ethan Miller/Getty Images North America) more pics from this album »