The main force, but not the core. Barcelona's second dream, the core is to organize Ronaldinho, but also can play a fake striker, that is, 9 and a half. At that time, Messi played the right avant-garde, with Giuly flanking Qi Fei on the left, Eto 'o as the striker, and Deco, Harvey, Iniesta and others in the midfield. Therefore, although Messi had just made his debut at that time, he soon became the main force, but because of the existence of his eldest brother Ronaldinho and his youth, he was the main force, not the core position.