After Banfield were beaten by San Lorenzo, Guillermo Barros Schelotto's side were crowned champions of Argentina once more
Boca Juniors were crowned champions of Argentina for a 32nd time after rivals Banfield suffered defeat on Tuesday.
A 1-0 loss to San Lorenzo left Banfield unable to catch Boca, who are five points clear at the top.
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Guillermo Barros Schelotto's men have lost just three league games this season, with Boca's title moving them a step closer to River Plate's record of 36.
Boca have been led by Dario Benedetto (18 league goals, three assists) and 21-year-old Argentinian Cristian Pavon (nine goals, seven assists).