Juan Manuel Marquez is arguably the greatest Mexican fighter of all time. The four-division world champion also holds the distinction of being Manny Pacquiao's toughest opponent.
Their four-fight series has been the greatest rivalry of this century. In 2003, Marquez came back from three first-round knockdowns to earn a draw against Pacquiao. The Filipino won their second and third fights, in 2008 and 2011, by hotly disputed split and majority decisions.
Marquez earned revenge in decisive fashion in December 2012, catching Pacquiao with one of the great counter rights in the history of the sport and putting the superstar to sleep in Round 6.
In his most recent fight, Marquez lost by split decision in a bid to earn a world title in a fifth division against Timothy Bradley last October.
Mike Alvarado has been far less celebrated in his own career, but the Denver native is an exciting, action fighter. In 2012 and 2013, he engaged in one of the best two-fight series of recent years with Brandon Rios. Alvarado lost by Round 7 TKO in a thriller in 2012 before coming back strong to win by unanimous decision in March 2013.
Last October, he dropped the WBO light welterweight title to Ruslan Provodnikov, when the Siberian pounded him en route to a Round 10 TKO. Alvarado came into the weigh-in for that bout looking like he'd escaped a death march, so perhaps 147 will be a healthier weight for him.
He has the opportunity to make history and ignite his career in his first bout at welterweight.