Argentina opened up a three-point lead in South America's World Cup qualifying group after goals from Lionel Messi and Gonzalo Higuain gave them a 2-1 victory over Chile on Tuesday.
Argentina weathered an early storm at the Estadio Nacional when Chile could have scored twice before Messi broke into the box, sidestepped a defender and beat goalkeeper Miguel Pinto in the 28th minute.
Three minutes later Higuain came into the box, rounded two defenders and curled a left-foot shot into Pinto's far corner.
Substitute Felipe Gutierrez pulled one back for Chile in added time.
Argentina are three points ahead of second-placed Ecuador with 20 points from nine matches, with Messi and Higuain joint top scorers with Uruguay's Luis Suarez on seven.