 Initially assigned to the "Primavera" squad, he made his first team – and Serie A – debut on 10 March 2002, starting in a 1–2 away loss against Atalanta.After suffering relegation, Ledesma was definitely promoted to the main squad.He scored his first goal for the club on 1 December 2002, netting the last in a 1–1 Serie B draw at Hellas Verona.