RIO DE JANEIRO, Dec 4 (Reuters) - Uruguay was left without any professional football at the weekend as the referees protested at an attack on an official at a reserve team game the week before.
Universidad Catolica and Universidad de Chile lost their quarter-final ties on a weekend of upsets in Chile while Wilstermann clinched the Bolivian championship with a 2-1 win over Real Potosi.
URUGUAY - Uruguay's referees refused to officiate at the weekend, causing all matches to be postponed.
The stoppage following an attack the previous week on referee Claudio Alvarado at reserve match between Rampla Juniors and Miramar Misiones.
Alvarado was left needing eye surgery after a member of the Rampla Juniors medical staff threw chalk in his face during protests at the end of the match.
The referees said the stoppage would be time for reflection after a series of incidents at youth team and amateur matches in the last few months.
The matches due to be played at the weekend will go ahead on Tuesday and Wednesday instead.
CHILE - Santiago pair Universidad Catolica and Universidad de Chile were eliminated from the Clausura championship after losing their quarter-final second legs.
Universidad Catolica slumped to a 3-0 home defeat against Audax Italiano who, already leading 1-0 from the first game, raced to a 2-0 lead in the 25 minutes through Juan Gonzalez and a Diego Rosende own goal.
Carlos Villanueva added the third in the second half, capping an outstanding performance in which he also hit the crossbar with a shot from near the halfway line.
Universidad de Chile, currently in the hands of a receiver after being declared bankrupt, lost 3-1 at Cobreloa to go down 3-2 on aggregate.
Two goals from Lucas Barrios and one from Argentine Jose Luis Dias put Cobreloa 3-0 ahead before Waldo Ponce pulled one back for Universidad, who were missing suspended striker Marcelo Salas.
O'Higgins qualified with a 2-1 win over Coquimbo Unido while Colo Colo face Puerto Montt on Wednesday.
BOLIVIA - Wilstermann won the second championship of the 2006 season, finishing four points clear of Real Potosi at the top of the six-team final stage following their win on Sunday.
The Aviators, needing a draw for the title, went ahead with a penalty converted by Brazilian Julio Cesar Carioca in the 40th minute.
Carlos Edu Monteiro, another Brazilian, equalised for Potosi on the hour but Argentine substitute Horacio Chiorazzo fired a 76th-minute winner for Wilstermann in front of a 35,000 crowd in Cochabamba.
Wilstermann, named after Jorge Wilstermann, one of Bolivia's first pilots, have won the title 10 times since the national league was formed in 1957. The last was in 2000.
COLOMBIA - Defending champions Pasto, whose players refused to train on Friday in protest at late payment of their wages, beat Tolima 2-1 in the semi-final stages of the Clausura championship.
Paraguayan Carlos Villagra and Oscar Dario Martinez scored the goals to leave Pasto second in semi-final Group A with four points from three games, two behind leaders Atletico Nacional who beat Chico FC 2-0.
Cucuta lead the other group with a maximum nine points after beating Medellin 2-1. Millonarios's chances in the same group took a knock as they lost 3-2 at Atletico Huila.
Curiously, Huila had beaten second division Valledupar in a relegation play-off on Wednesday.
Despite finishing in the top eight of the Clausura championship's qualifying stage, Huila also finished bottom from one in the relegation standings which are taken over three years.
This forced them to play off to keep their place in the top flight even though they are challenging for the title.
ECUADOR - Leading scorer Luis Miguel Escalada took his tally this season to 25 goals by scoring twice in Emelec's 3-1 win over Olmedo. Emelec are third in the final stage of the championship with 12 points from seven games, ahead of their Guayaquil neighbours Barcelona on goal difference.
LDU and El Nacional drew 0-0 to stay level at the top on 14 points.
PERU - Alianza Lima stayed two points clear of Coronel Bolognesi at the top of the championship's second stage after the teams drew 0-0.
Bolognesi enjoyed the better of the game, forcing three outstanding saves from Alianza goalkeeper George Forsyth in the first half. They also had a Johan Fano goal controversially disallowed for offside in the second half.
Cienciano missed a chance to go level with Alianza when they conceded four goals in half an hour either side of halftime and lost 4-1 to San Martin.
PARAGUAY - Cerro Porteno completed the second stage of the championship unbeaten by beating Tacuary 2-1 in their final game. Cerro won 16 and drew 4 games in their 20-match campaign.
They will face Libertad, who won the first stage earlier in the year, in the two-leg final as they attempt to win their third successive title.