Javier Castilla is a demanding, strict trainer, with a lot of discipline. He was a Real Madrid player for 10 seasons and uses this experience as a player in the formation of many teams, including Atlético de Madrid and later Real Madrid, where he was fortunate to return as a coach. At Atlético de Madrid, he had first-rate players at his command, such as Oliver Torres, Saúl Ñíguez and Javier Manquillo among others,