Contrasts lie at the heart of boxing, both in terms of styles and personalities. The differences between Saturday's main event fighters -- WBO super bantamweight titlist Nonito Donaire and Mexican veteran Jorge Arce -- couldn't be more stark. Donaire has a pleasant but reserved demeanor while Arce is the ultimate extrovert. Donaire is careful and scientific as he picks his opponents apart while Arce bulldozes his way inside and blasts away with both hands, often bleeding heavily as he does so. Donaire is making a big run toward Fighter of the Year status for 2012 while Arce is looking to achieve yet another improbable comeback. In other words, Donaire is clinical; Arce is chaotic.
Will one of the best of today add to his impressive resume or will one of yesterday's best find his way back to the top of the mountain?