RIO DE JANEIRO, Nov 2 (Reuters) - Colo Colo let slip a 4-0 lead when they were held to a 4-4 draw by La Serena in the Chilean championship on Wednesday.
Two goals by Uruguayan striker Martin Liguera helped keep Alianza Lima top in Peru after a 2-1 win over Union Huaral while three teams are level on points at top of the final stage in the Ecuadorean championship.
CHILE - Wednesday's matches produced a flurry of goals as Universidad de Chile won 6-2 at Union Espanola and Colo Colo were involved in an eight-goal thriller.
Colo Colo rested several top players but still raced to a 4-0 lead in 50 minutes with two goals each from 17-year-old striker Alexis Sanchez and Miguel Caneo.
Despite having coach Victor Castaneda sent off for arguing, La Serena hit back with a Pablo Bolados hat-trick, which included a 90th minute equaliser, and one from Rodolfo Moya.
Colo Colo, who have 26 points from 15 games and are second in Group One, had Gonzalo Fierro sent off for a second bookable offence as their frustration boiled over.
Striker Rodrigo Astudillo scored twice in the first 12 minutes for Universidad de Chile at Union Espanola.
Roberto Ordones and Patricio Alendra scored in a six-minute spell as the hosts made it 2-2 before Patricio Ormazabal put the visitors 3-2 up at halftime.
Manuel Iturra and Luis Pedro Figueroa made it 5-2 in the second half before Astudillo completed his hat-trick in the 90th minute.
Group C leaders Puerto Montt became the first team to book a quarter-final place by beating Universidad de Concepcion with a goal from Ivan Alvarez, who scored one minute after coming on as a substitute.
Provincial clubs Cobreloa, who drew 1-1 at Coquimbo, and O'Higgins, who lost 2-1 at Cobresal also lead Groups A and B respectively.
Universidad Catolica recorded their fourth win in a row as they made the long trip north to Antofagasta and came from behind to win 2-1 to stay top of Group D. Claudio Munoz scored the winner in the 78th minute.
PERU - Alianza Lima opened up a five-point lead in the championship's second stage with their win over bottom-of-the-table Union Huaral.
Liguera put Alianza ahead from a free kick in the third minute and scored the winner in the second half after Johan Sotil had equalised before halftime.
Second-placed Coronel Bolognesi lost 1-0 at home to Sporting Cristal, Argentine-born striker Luis Bonet scoring the only goal.
ECUADOR - LDU, Emelec and El Nacional all have six points after two games of the championship's final stage.
Former Ecuador striker Agustin Delgado scored twice in four minutes as LDU beat Deportivo Quito 4-1.
Colombian Elkin Murillo and Ariel Graziani shared the other LDU goals and Rolando Jacome replied for Deportivo.
Argentine striker Luis Miguel Escalada scored his 20th goal of the championship in Emelec's 3-2 win over army club El Nacional, who carried five bonus points through from the first two stages but have taken only one point from their first two games.