Torneo Inicial champions Velez Sarsfield began the Torneo Final with a 1-0 win at Argentinos Juniors. Lucas Pratto scored the only goal of the game on the stroke of half-time to help his side make the ideal start to the new campaign.
Elsewhere, substitute Dario Benedetto netted seconds after coming on for 10-man Arsenal Sarandi in their 1-1 draw at Union Santa Fe.
Last year's bottom-placed side took a sixth-minute lead through Brahian Aleman and their prospects of victory were given a boost when the visitors had Pablo Luguercio sent off 12 minutes from time.
But Benedetto grabbed a point for Arsenal in added-time, mere moments after being introduced from the bench.