Independiente del Valle have guaranteed their spot in the Copa Libertadores semis after defeating Pumas UNAM on penalties in Tuesday's quarterfinal second leg.

The unfancied Ecuadorian side lost 2-1 at the Estadio Olimpico Universitario but with the aggregate result tied at 3-3 the match went to penalties.

Pumas appeared to be cruising in the first half, with a three-minute brace from Ismael Sosa putting the hosts well in control.

The contest then looked to be over in the 56th minute when Los Negriazules defender Luis Ayala was shown a straight red card for a late foul.

Junior Sornoza, however, brought the visitors back into the tie with a brilliant free kick on 66 minutes, before Arturo Mina slotted the decisive penalty in the 5-3 shootout triumph.