BUENOS AIRES — World Boxing Council champion Sergio Martinez will defend his middleweight crown against unbeaten Briton Martin Murray in Argentina April 17, according to Argentine media reports. The venue for the bout will be chosen from the Monumental stadium belonging to Martinez's favorite soccer team River Plate and the Luna Park, both in Buenos Aires, and the Estadio Unico in the provincial capital La Plata, the DyN news agency said. Argentine Martinez won the title in an unanimous points decision against Mexican Julio Cesar Chavez Jr. in Las Vegas in September. — Reuters