A double by Darwin Machis and Josef Martinez's goal helped Venezuela beat Bolivia 3-1 and advance to the Copa America quarter-finals.
Brazil overwhelmed Peru with three goals in a superb first half to set up a crushing 5-0 victory on Saturday and cruise into the Copa America quarter-finals.
Striker Paolo Guerrero led Peru to a key 3-1 win over Bolivia on Tuesday that improved the team's chances of advancing to the knockout stage of Copa America.
With Neymar watching from afar, it was Philippe Coutinho who came through for Brazil in the Copa America opener.
Neymar has criticised conditions at Bolivia's Estadio Hernando Siles in La Paz, describing it as "inhuman" to play at such severe altitude.
Brazil were held to a 0-0 draw away to Bolivia in a World Cup Qualifier on Thursday with home goalkeeper Carlos Lampe in outstanding form.
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