Photos: Jaime Munguia Blasts Out Brandon Cook in Three

In the evening's co-main event, Jaime Munguia (31-0, 26KOs) of Tijuana, Mexico defended his WBO Junior Middleweight Title with a dominant third-round technical knockout victory against Brandon Cook (20-2, 12KOs) of Ontario, Canada in tonight's co-main event, which was scheduled for 12 rounds at T-Mobile Arena. (photos by Ed Mulholland and Zanfer).

David Lemieux (40-4, 34KOs) of Montreal, Canada defeated Gary O'Sullivan (28-3, 22KOs) of Cork, Ireland via knockout in the first round of a middleweight bout scheduled for 12 rounds. Lemieux earned a chance at the WBA Middleweight Title by stopping O'Sullivan at 2:44 seconds of the aforementioned round

In what will surely go down as one of the closest and most hard-fought middleweight title fights in boxing history, Lineal Middleweight World Champion Canelo Alvarez (50-1-2, 34 KOs) went toe-to-toe in 12 rounds of non-stop action to defeat the reigning WBC, WBA and IBO Middleweight World Champion Gennady "GGG" Golovkin (38-1-1, 34 KOs) by majority decision in their middleweight championship rematch.

The fight was stopped at 1:03 of the third round. 

Vergil Ortiz Jr. (11-0, 11KOs) of Dallas, Texas defeated Roberto Ortiz (35-3-2, 26KOs) of Torreon, Mexico via technical knockout in the second round of a super lightweight fight originally slated for eight rounds.

Alexis Rocha (12-0, 8 KOs) of Santa Ana, California was victorious against Carlos Ortiz (10-3, 10 KOs) of Torreon, Mexico in an eight-round super welterweight fight. Rocha won with scores of 80-72, 80-72 ,79-73.