Pablo Ledesma scored in the 50th minute and Juan Sanchez Mino added another in the 90th to rally 10-man Boca Juniors to a 2-0 victory over fellow Argentine club Arsenal in the Copa Libertadores on Thursday.
The victory improved Boca to seven points in four matches, shoring up the Buenos Aires club's grip on second place in Group 4.
In Thursday's other group game, Brazil's Fluminense beat Venezuela's Zamora 1-0 to move to a perfect 12 points from four games, guaranteeing it a spot in the next round. Boca has seven points, Arsenal has three and Zamora one.
Boca defender Leandro Somoza was sent off when he picked up his second yellow card in the 37th minute.
Ledesma scored on a counterattack at Boca's Bombonera stadium. Santiago Silva started the play, passing to Juan Roman Riquelme whose shot was deflected by Arsenal keeper Cristian Campestrini into the path of Ledesma, who chipped it home.
Sanchez Mino scored in the final minute, taking a pass from Silva and connecting from the left wing.
Boca had the better chances in the first half with Pablo Mouche, Ledesma and Walter Erviti coming close. Gonzalo Espinoza had Arsenal's best opportunity, shooting just wide of the near post in the 30th minute.
Rafael Sobis scored Fluminense's winner with a 79th minute free kick.