Viera bagged his second with a stunning free kick in the 56th minute, before Cedric Bakambu added the fifth in the 85th minute.
Uruguay will meet Chile in Montevideo and Argentina face Ecuador in Buenos Aires in other opening day fixtures.
Brighton produced a surprise as they won 3-0 away to Newcastle United. Neil Maupay scored twice in the opening seven minutes, the first from the penalty spot, and Aaron Connelly added a third with seven minutes left to play.
‘The feeling I got when skiing was a kind of happiness which I hadn’t felt in a long time.’
Monday's match also saw Guangzhou R&F edge Dalian Pro 1-0 by Ye Chugui's late goal in the 92nd minute. The three points also helped R&F join the chase for fourth place in Dalian.
And while the sport of skiing in China is still developing, at least at the amateur level, Chinese skiers are hopeful for the growth Beijing 2022 can bring.
The young Norwegian returned a positive test result for COVID-19 after that game, but a second test came back negative and he has returned to training after having to sit out the start of the week. Zidane will have to decide whether he maintains Odegaard in an attack-minded midfield alongside Luka Modric and Toni Kroos, or whether Casemiro returns to the side.
Meanwhile, the Barcelona-based sporting press reported on Monday that striker Luis Suarez and the club have reached an agreement to rescind the Uruguayan's contract and allow him to leave on a free contract.
Using 100% clean energy for the Games venues, and natural carbon dioxide as refrigerant to lower carbon emissions to nearly zero in the ice-making process are some of the steps taken to make the Games green.
The weekend now kicks off on Saturday lunchtime with Alaves looking for their first point of the season when they entertain an always complicated Getafe, who are coached by former Alaves boss Jose Bordalas.
It may seem harsh to say that the reigning Champions have problems scoring goals, but that was one of Real Madrid's main issues last season, with much of the responsibility falling on Karim Benzema.