On 10 August 2006, Tissone was signed by Atalanta in a co-ownership deal for €1.5 million in a five-year deal. However, Udinese also acquired 50% of the registration rights of both Michele Rinaldi for €800,000 and Christian Tiboni for €1.1 million, Tissone played 33 games for the Bergamo-based club in 2006–07 Serie A season. In June 2007 the co-ownerships were renewed.