San Lorenzo moved up to fourth in the embryonic Argentinian Clausura table with a 2-0 victory over Godoy Cruz.
Second-half goals from Juan Carlos Menseguez and Nahuel Benitez were enough to secure the win.
Arsenal Sarandi picked up their first win of the season as they beat 10-man Tigre 2-0.
Lisandro Lopez fired Arsenal ahead before the visitors had Roman Martinez dismissed after half an hour. A late goal from Jorge Ortiz sealed the win for the hosts.