On 17 June 2007, Lyon president Jean-Michel Aulas confirmed that Tiago's departure from Lyon was imminent with both Juventus F.C. and A.C. Milan reportedly after his signature. He officially signed for the former on 21 June 2007, for a €13 million fee. His performance in 2007–08 was criticised, however, with Goal.com describing him as the third biggest flop of the season.