Hosts and tournament favourites Argentina brushed aside recent criticism to storm out of the Copa America group stage with a comfortable 3-0 victory over Costa Rica on Monday.
FC Porto star Radamel Falcao scored both goals as Colombia defeated Bolivia 2-0 on Sunday to become the first team to advance to the quarter-finals of the Copa America.
Argentina legend Diego Maradona has defended under-fire forward Lionel Messi after criticism of his below-par performances at the Copa America.
Brazil striker Fred came off the bench to score a last-gasp equaliser and earn his side a 2-2 draw in their Copa America Group B clash with Paraguay.
Chile came back in their Copa America Group C clash with Uruguay on Friday evening to earn a 1-1 draw in Mendoza.
Costa Rica have recorded a 2-0 win over a nine-man Bolivia outfit in their Group A Copa America match on Thursday.
Argentina were booed off the pitch by their own fans, and are yet to register a win at the Copa America after being held to a 0-0 draw by Colombia.
Uruguay were held to a 1-1 draw by Peru as Group C action in the 2011 Copa America commenced in San Juan on Monday.
Mexico midfielder Jonathan dos Santos has publicly apologised for his part in the incident which saw him and seven team-mates handed six-month international suspensions.
Brazil's young strikers have vowed to put the disappointing 0-0 draw against Venezuela behind them as they look to improve upon their lacklustre finishing in the Copa America.