Boca Juniors’ victory in El Bosque on Saturday night against Gimnasia could be a crucial moment in the title race after Andrés Chávez’s 90th minute winner ensured that Rodolfo Arruabarrena’s side remain top of the league and put the pressure back on San Lorenzo and River Plate. Gimnasia have proved to be a very dangerous side in recent weeks but their aggressive approach to defending against Boca cost them dearly. Oliver Benítez was sent off for a pretty wild challenge on Adrián Cubas after just 20 minutes but despite the numerical disadvantage the home side took the lead just after the break. Nicolás Mazzola ran clear of the Boca defence and skipped around Agustín Orión to snatch the opener and when Jonathan Calleri levelled the numbers by inexplicably elbowing Osvaldo Barsottini off the ball, the upset looked a real possibility. Nicolás Lodeiro had other ideas and fired in an equaliser with the game wide open. Maxi Coronel’s potentially leg breaking tackle on Gino Peruzzi warranted another red card and handed the advantage back to Boca. Desperate for victory, Los Xeneizes piled forward and in the last minute of ordinary time Andrés Chávez struck a dramatic winner. Seven wins from their last eight matches ensure that Boca remain favourites for the title.