Velez Sarsfield stay perfect, Cruz off the mark
Velez Sarsfield claimed their third win in as many games as they beat Argentinos Juniors 2-0 at home.
Leandro Somoza opened the scoring with a 70th-minute penalty before Santiago Silva sealed the victory for the hosts five minutes later.
A hectic eight-minute period was capped when Argentinos Juniors defender Santiago Gentiletti was sent off in the 78th minute.
Racing Club were unable to maintain their perfect start as they suffered a 2-1 loss at home to San Lorenzo.
Sebastian Balsas scored the winner five minutes from the end after home striker Pablo Luguercio (55) had cancelled out Guillermo Pereyra's 19th-minute opener.
Godoy Cruz won for the first time with Ariel Rojas' 41st-minute strike enough to overcome Olimpo.
Salcedo Gonzalez's 13th-minute equaliser helped Lanus claim a 1-1 draw at Quilmes after Juan Morales struck first with seven minutes played.