Dalla Bona's move to London saw the Italian Football Federation amend the legislation regarding the sale of their young players.

In his final season at Chelsea, 2001–02, he contributed 4 more goals in the Premier League, including an injury time winner against Ipswich Town[4] and the third in a 4-0 thrashing of Liverpool.

[14] At the end of the championship he returned to Milan, but after a few weeks he signed for Napoli, then in the Italian Serie B league, on free transfer, despite still having a year left in his contract.

On 4 February 2009, Dalla Bona announced that he had left Napoli and was hoping to train with West Ham United to secure a permanent contract under former Chelsea teammate Gianfranco Zola.

However, he failed to adjust in the team, mainly due to lack of fitness and his contract was terminated in December 2009, after making just three appearances (all as a substitute) in competitive matches.

On 31 August 2011, the final day of the summer transfer window, Dalla Bona signed a one-year contract for Mantova[19] A.C. Milan