The document discusses models of game used at different levels of soccer. At the professional level, the model of game is team-centered and aims to win games. At the youth level, the model should be player-centered and used as a tool to develop players' potential, not just win games. An effective model of game incorporates tactical principles for different moments and phases, playing systems tailored to player development, and emphasis on individual tactical functions over early specialization. The training model should integrate tactical, technical, and physical periodization to optimize player development.