Diaz scored a sensational winner with virtually the last kick of the match as Colombia beat Peru 3-2 in Brasilia on Friday.
The city said attendees will be spread throughout the entire stadium this time, instead of concentrated in one section.
Almiron got a goal and an assist as Paraguay beat Chile 2-0 in the Copa America on Thursday and confirmed their place in the last eight.
Uruguay hadn’t beaten Argentina in the Copa America since 1989 and they went behind early on to Rodriguez’s header.
Nearly two thirds of Brazilians oppose the country hosting the upcoming Copa America soccer tournament, a poll showed on Friday.
Brazil was unexpectedly chosen to host the Copa America after Argentina withdrew because of a surge in COVID-19 cases.
Brazil named Rio de Janeiro and three other cities as host venues for the Copa America.
A decision on who will host next month’s Copa America will be made by next week and Chile could join Argentina as co-hosts.
Colombia will ask the South American Football Confederation (CONMEBOL) to postpone the Copa America tournament until spectators can be present at stadiums.
Brazil have recalled Dani Alves for their World Cup qualifiers against Ecuador and Paraguay.
Messi was banned for one game after being sent off in the Copa America third-place playoff against Chile
The competition, initially scheduled in 2020 summer in Argentina and Colombia, was moved to 2021 summer due to the spread of coronavirus.
The CONMEBOL has announced the postponement of the Copa America until 2021 due to the outbreak of the coronavirus.
Lionel Messi said his team was feeling bitter after Argentina lost their opening Copa America match 2-0 to Colombia despite dominating the second half.
The two-time reigning champions are not among the favourites this time around having lost some of the players who took them to win Copa titles in 2015 and 2016
Roger Martinez scored an outstanding goal as Colombia beat Argentina 2-0 in an exciting finale to a Copa America Group B opener.
A brace from Philippe Coutinho handed hosts Brazil a winning start to the Copa America on Friday in a 3-0 victory over Bolivia as the absence of superstar Neymar was quickly forgotten.
Argentina included Lionel Messi, Sergio Aguero and Angel Di Maria in its Copa America squad, while Inter Milan striker Mauro Icardi was left out, AP reported.
Brazilian coach Tite included Manchester City’s Fernandinho for his Copa America squad on Friday, but there was no place for Spurs forward Lucas Moura or Liverpool midfielder Fabinho.
Argentina have asked interim coach Lionel Scaloni to stay in charge of the team until next year's Copa America, the head of the Argentine Football Association (AFA) said on Thursday.