River Plate and Boca Juniors both won at the weekend.
River Plate and Boca Juniors both began the 2015 Argentine Primera Division season by picking up three points as they beat Club Atletico de Sarmiento (4-1) and Olimpo (3-1) respectively.
The reigning champions of the Copa Sudamericana cruised to an easy 4-1 win over Sarmiento thanks to two goals from the Colombian Teofilo Gutierrez, one from the Uruguayan Carlos Sanchez and another one from Fernando Cavenaghi. Hector Cuevas scored for Sarmiento, who are playing in the Argentine top flight for the first time in 33 years.
It means that boss Marcelo Gallardo has guided River to wins in their first three competitive games of the season after they won both legs of the Recopa Sudamericana final 1-0 against Copa Libertadores champions San Lorenzo.
Meanwhile, Boca Juniors, who are another major title contender, also began their 2015 tournament with a victory by beating Olimpo 3-1 in Buenos Aires.
Fernando Gago opened the scoring for home team with a penalty, Jonathan Blanco equalised for Olimpo, but youngster Sebastian Palacios scored a brace in the final 15 minutes to wrap up the three points.
Both sides are in Copa Libertadores action this week, as River travel to San Jose and Boca visit Palestino.