Once Caldas Squeeze Into Final Sixteen of the Copa LibertadoresnewsRIO DE JANEIRO (Reuters) - Defending champions Once Caldas squeezed into the last 16 of the Libertadores Cup on Thursday by beating San Lorenzo 1-0 away in their last group game. Midfielder John Viafara scored the winner for the Colombian team starting and finishing a move in the 43rd minute as they overcame the already-eliminated Argentines in Buenos Aires in Group Seven. Guadalajara's all-Mexican team joined them by beating Chilean champions Cobreloa 3-1 at home. Guadalajara the only Mexican team not to field foreigners finished top with 11 points from six games. Caldas were second with nine after their win took them above Cobreloa who finished with eight. San Lorenzo who finished bottom of the group with three points and failed to win a game fielded several reserves against Caldas. They still had the better of the game until just before halftime when Viafara collected a pass from Tressor Moreno and rounded goalkeeper Jose Ramirez to score after starting the move on the right. San Lorenzo defender Ariel Perreira was sent off in the 76th minute after committing two bookable offences in four minutes. Guadalajara booked their place by scoring three goals in a 20-minute spell against Cobreloa at the Jalisco stadium which was half-full with a 40000 crowd. Midfielder Ramon Morales got them off the mark in the 50th minute when he bundled the ball into the net. Striker Adolfo Bautista converted a penalty in the 59th minute and fired the third emphatically into the roof of the net after being left unmarked at the far post in the 67th. Jose Luis Diaz hooked the ball in to score a consolation for the Desert Foxes one minute later.