Peru face Bolivia, knowing a win will put them in a strong position to progress to the knockout stages.
The Incas played out a disappointing 0-0 draw with Venezuela in their opening game but know that even third place will probably be enough for a quarter-final spot.
Neighbours Bolivia, meanwhile, were hammered by Brazil and know a defeat will almost certainly send them home.
What time does Bolivia vs Peru kick off?
This Copa America clash will take place tonight.
It will kick off at 10.30pm UK time – 6.30pm in Rio de Janeiro.
The match will be held at Maracana Stadium.
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What TV channel is it on and can I live stream it?
Premier Sports will be showing live UK coverage of all the matches in the Copa America across its two channels.
The channels can be purchased to add to Virgin and Sky packages from £9.99 a month.
You can also live stream for the same cost via Premier Player.
In Peru the game will be live on America Television, while in Bolivia it will be shown on Bolivia TV.
What is the team news?
Goalkeepers: Carlos Lampe, Ruben Cordano, Javier Rojas
Defenders: Marvin Bejarano, Diego Bejarano, Luis Haquin, Adrian Jusino, Mario Cuellar, Saul Torres, Roberto Fernandez, Jose Mario Carrasco
Midfielders: Alejandro Chumacero, Raul Castro, Erwin Saavedra, Leonel Justiniano, Samuel Galindo, Fernando Saucedo, Diego Wayar, Paul Arano
Forwards: Marcelo Martins, Gilbert Alvarez, Rodrigo Ramallo, Leonardo Vaca
Goalkeepers: Pedro Gallese, Carlos Caceda, Patricio Alvarez
Defenders: Luis Advincula, Carlos Zambrano, Miguel Trauco, Aldo Corzo, Alexander Callens, Miguel Araujo, Anderson Santamaria, Luis Abram
Midfielders: Yoshimar Yotun, Christian Cueva, Edison Flores, Renato Tapia, Christofer Gonzales, Jesus Pretell, Paolo Hurtado
Forwards: Jefferson Farfan, Paolo Guerrero, Andre Carillo, Raul Ruidiaz, Andy Polo