This reliable platform gathered that they are Colombia, Brazil, Argentina and Peru.
Hosts Brazil had earlier booked their place in the semi-final, where they will face Peru.
On Sunday, Argentina thrashed Ecuador 3-0 with Messi starring for his country.
Colombia overcame Uruguay on penalties in the second quarter-final tie of the day.
Both teams will now face each other for a place in the final.
The semi-final games will be played on July 5 and 6 respectively, while the final is billed for July 10.