South America: Red cards fly in Uruguay
Chile's championship remains suspended in the wake of the massive earthquake last month.
Four players were sent off, two from each team, as Uruguayan former Paraguay coach Sergio Markarian got off to a losing start in charge of Danubio, who lost 3-2 to Racing having taken a two-goal lead after half an hour.
Racing had defender Mathias Abero dismissed after 18 minutes for a foul as last man but Danubio striker Diego Ifran missed the penalty.
Danubio's former Inter Milan and Uruguay forward Alvaro Recoba was shown a straight red card in the 55th and his team mate Pablo Caceres suffered the same fate 20 minutes from time. Racing striker Nicolas Lopez was sent off in the final minute.
Goals from midfielder Pablo Migues and Recoba, his first since returning home from Italy, had Danubio two up.
Midfielder Jorge Luis Cazulo pulled one back on the stroke of halftime and substitute Martin Cauteruccio and midfielder Santiago Ostolaza turned the result around in the last five minutes.
Antonio Pacheco scored a hat-trick as Penarol crushed Cerro Largo 5-0 to stretch their perfect run to seven matches in the Clausura. They lead by five points from second-placed Fenix and Pacheco is leading scorer with a tally of 10.
Gustavo Varela scored twice, one of his goals a penalty, to give champions Nacional a 2-1 win over Wanderers. Nacional are third eight points behind their arch-rivals Penarol.
Nine-man LDU beat Deportivo Quito 1-0 at the Atahualpa stadium in the capital with a 15th-minute goal by Edison Mendez in one of the country's two big derbies.
LDU had two players sent off in the first half but still managed to hold on for victory. Former Aston Villa, Reading and Ecuador defender Ulises de La Cruz went for a tackle with his studs up on Angel Escobar and international midfielder Neicer Reasco was dismissed for a second yellow card. Deportivo's Isaac Mina was sent off in the second half.
Emelec, crushed 5-0 by LDU last weekend, bounced back to beat arch-rivals Barcelona 3-0 in the "Shipyard classic", the big derby in the Pacific port city of Guayaquil.
Argentine striker Hernan Peirone was sent off a quarter of an hour from time, three minutes after scoring Emelec's second goal, for a second bookable offence.
Unbeaten LDU lead with 13 points from five matches, two points more than Deportivo Cuenca and three ahead of Barcelona.
Champions Deportivo Quito are one from bottom after losing four of their five matches.
The Chilean federation (ANFP) decided on Saturday to suspend this year's two championships, the already-started Apertura and the Clausura as a result of the devastation caused by the massive earthquake that has claimed hundreds of lives.
It will stage a single championship with a starting date yet to be decided.