Portuguese (Brazil): The team that is up against Flamengo in the Libertadores tournament is currently training at the Fluminense’s Training Center.
The sentence has been expanded to provide more context and clarity. It now specifies that the team is “up against” Flamengo, indicating they are competing against them in the Libertadores tournament. Additionally, it clarifies that this team is currently training at the Fluminense’s Training Center, giving a sense of where the activity is taking place.