Diego Simeone praised Joao Félix after the teenager's impressive start at Atlético Madrid continued against Juventus on Saturday.
Joao Félix scored one and set up the other as Atlético completed a perfect pre-season with a 2-1 International Champions Cup victory over Juve in Stockholm.
Youngster has made instance impact since big-money move
The 19-year-old arrived at the LaLiga giants from Benfica for a reported 126 million euros in July and has scored three goals and provided four assists in five pre-season games.
Simeone has been impressed with what he has seen from Joao Félix, who netted 20 times in 42 games in all competitions for Benfica last season.
"Joao has many capabilities. He is adapting very quickly to what the team needs," the Atlético coach told a news conference.
"He has a vision that allows him to adapt to many positions and is in a process of adaptation and the best thing he has is, I said from the first day, his desire to learn.
"He wants to learn and with that the adaptation process will be shorter. Talent is innate, but the desire to learn is the shortest path that a player has to perform."
Atlético have gone through a rebuild in the close season, the likes of Joao Félix, Marcos Llorente and Kieran Trippier joining, while Antoine Griezmann, Rodri, Lucas Hernández, Diego Godín, Juanfran and Filipe Luis are among those to have left.
Simeone expects Correa to stay at Atlético
Argentina forward Ángel Correa is also linked with a move to AC Milan, but Simeone expects the 24-year-old to stay at Atlético.
"We are open to everything that can happen, transfer wise. There is nothing that can surprise us because obviously there is always something happening until the end so we have to be prepared for that," he said.
"Ángel Correa is training in an extraordinary way since he arrived back and there's not any situation that leads me to think about him leaving the team."