By Jhonny Gonzalez

WBC middleweight champion Sergio Martinez (50-2, 28KOs) returns to the ring on April 27th against unbeaten Martin Murray (25-0-1, 11KOs) in Argentina. After winning titles in two weight division, with multiple runs, and becoming a star who makes millions of dollars - Martinez wonders how much more he can possibly accomplish. 

Martinez, who turns 38 in February, says his career is reaching the final stage.

"Sometimes, I think [about the fact] that I have nine belts at home. I feel that there is a lot that I [accomplished]. What else can I accomplish? I signed a contract with HBO for three more fights that [are probably going to] be the last of my career, including April 27. Boxing is losing prominence in my life. I'm currently living during a great period [of my life] where I can not afford to lose any motivation or desire to keep winning. So today that is stronger than any other feeling [in my body]," Martinez said.

Beyond Murray, Martinez may face Julio Cesar Chavez Jr. in a rematch on a September date. Martinez is also growing his own promotional company and helps the careers of such fighters like Kiko Martinez and Gabriel Campillo.