With the top two places still up for grabs in Group 8, Gremio ensured it advanced with a 4-0 thrashing of point-less Zamora.

Luan opened the scoring for the Brazilian host in the 23rd minute before Lucas Barrios tapped in a second.

It was 3-0 before the half-hour mark as Luan stepped up to convert a penalty, and the result was sealed in the second half through Pedro Rocha.

Luan had a chance to complete his hat-trick in the 83rd minute, but this time was unable to put away his spot-kick.

The result saw Gremio finish top on 13 points, two ahead of Guarani – which played out a 0-0 draw at home to Deportes Iquique.

Deportes Iquique needed a win in Asuncion but were unable to find a breakthrough, finishing third.

In Group 3, River Plate – with top spot sealed – suffered a 2-1 loss at home to Medellin.

Despite the win, the Colombians finished third in the group after Emelec eased past Melgar 3-0 to secure second.

Barcelona and Botafogo had already advanced from Group 1 and both suffered losses.

Group leader Barcelona went down 3-1 at Atletico Nacional, while Botafogo was edged 1-0 at Estudiantes.