Argentinian champions Velez Sarsfield are on the brink of the Copa Sudamericana quarter-finals after claiming a 2-0 away win over Chile's Universidad Catolica.

In the first leg of the round-of-16, Velez were impressive at the Estadio San Carlos de Apoquindo in Santiago and secured the win with two first-half goals.

In the 14th minute, Hector Canteros crossed the ball to Guillermo Franco, who opened the scoring.

Alfonso Parot had the opportunity to equalise but Velez keeper Marcelo Barovero saved his header.

Velez doubled the lead four minutes before half-time when Augusto Fernandez found Ivan Bella, who beat Fabian Cerda.

The second leg will be played on October 20 in Buenos Aires but Velez defender Sebastian Dominguez told Fox Sports he expects a difficult game.

He told Fox Sports: "The result is good, but everything will be defined in the return game.''

Velez boss Ricardo Gareca added: ``It is not easy to win here. I want to

congratulate my guys.

``However, Catolica are rivals to be careful of. We should not be over

confident.''

In Bolivia, hosts Aurora came back from a goal down to beat Brazilian giants

Vasco da Gama.

Bernardo put the visitors ahead in the 41st minute, but Aquilino Villalba

levelled four minutes after the interval.

Augusto Andaveris put Cochabamba-based side Aurora in the 57th minute, before

Jair Reynoso consolidated the win a quarter of an hour before full-time.

Villalba was sent off three minutes later due to a tackle on Vasco keeper

Fernando Prass and will miss the second leg on October 26.

``Winning is always good, even more if you win by two goals, but Vasco are a

great team and they will be tough in Rio de Janeiro,'' Reynoso said.