A brace from Nicolas Blandi helped leaders Boca Juniors to an impressive 2-0 win at Colon Santa Fe.
Blandi struck in the 14th and 62nd minutes for Julio Cesar Falcioni's men, who are six points clear at the top of the table.
A 3-1 win over Argentinos Juniors allowed Atletico Rafaela to stay in touching distance in second.
Diego Gandin got them going with a sixth-minute penalty and Federico Gonzalez doubled their lead in the 20th minute.
It was three before the break thanks to Oscar Carniello and it looked as though the goals would continue to flow when Juniors had Emilio Hernandez sent off before the break.
But the visitor actually pulled a goal back through Gustavo Oberman and kept the scoreline respectable.
Velez Sarsfield moved into third place in the table with a hard-fought 1-0 win over Estudiantes.
David Ramirez got the goal as early as the seventh minute, with his side then holding out to secure a sixth win of the campaign.
Adrian Gonzalez scored the only goal of the game 15 minutes from time as Arsenal Sarandi beat San Lorenzo 1-0.
