Chavez vs Rubio: Live Results and Round-By-Round Coverage

Tonight at 10 p.m. EST, HBO goes live with the network's first boxing show of 2012, a double-header featuring a pair of title fights.

In the main event, WBC middleweight titlist Julio Cesar Chavez Jr (44-0-1, 31 KO) defends against Marco Antonio Rubio (53-5-1, 46 KO) in a 12-round bout. Chavez is making the second defense of the title he won from Sebastian Zbik last June, following a win over Peter Manfredo Jr in November.

[ Related: Early Undercard Results ]

The co-feature will decide the vacant WBO super bantamweight title. Nonito Donaire (27-1, 18 KO) is back in action in his first fight at 122 pounds, facing ex-titlist Wilfredo Vazquez Jr (21-1-1, 18 KO) in another 12-round bout. Donaire is looking to pick up a title belt in a third weight class, following titles at 112 and 118 (he won only an interim belt in his stopover at 115).

These two fights will conclude a long day of live coverage here at Bad Left Hook, so join us as we wrap up our first really big weekend of fights this year.