During this period, Juventus had one of the strongest teams in the world, and Tudor contributed well, with over 150 total appearances for the club, scoring nearly 20 goals, as a centreback. After a major injury in 2004, however, Tudor was loaned out to Siena in January 2005 after seven seasons with Juve. Following the revocation of Juventus' 2004–05 and 2005–06 Serie A titles due to their involvement in the "Calciopoli" scandal, as well as the expiration of his loan contract with Siena, Tudor returned to Juventus, staying with the club despite their relegation to Serie B, but injuries kept him off the pitch all the season. His contract expired on 30 June 2007.