The Argentinean, who joined Boca on a six-month loan deal in June, struck the winner on 83 minutes to ensure Los Xeneizes held the lead over their Brazilian rivals going into the second-leg at La Bombonera on Wednesday July 31.
Watch Brighton & Hove Albion midfielder score stunning goal on Boca Juniors debut
Brighton & Hove Albion midfielder Alexis Mac Allister scored a glorious goal on his competitive debut for Boca Juniors to help his new club win their Copa Libertadores round of 16 first-leg 1-0 at Athletico Paranaense last (Wednesday) night.