Ayala played for Napoli from 2000 to 2007. During his time at Napoli, Ayala was a key player in the club's defense and helped the team to win the Coppa Italia in 2004 and the Supercoppa Italiana in 2005. He was also named in the Serie A Team of the Year in 2005.
Mastering the Field: The Roberto Ayala Elite English Quiz