Sergio Martinez vs. Martin Murray to be held in 50,000 seat stadium in Buenos Aires, Argentina

New York, NY (2/5/13) - Middleweight kingpin Sergio "Maravilla" Martinez was on the cover of this month's Argentine edition of Rolling Stone magazine that hit stands yesterday. The WBC middleweight champion Martinez (50-2-2, 28KO's) is set to defend his crown April 27th against the U.K.'s undefeated Martin Murray (25-0-1, 11KO's) at Club Atlético Vélez Sarsfield