The 26-year-old moved from PSG to Man City in the summer following a remarkable contract fallout with the French giants.
Donnarumma has become Pep Guardiola’s undisputed number one, keeping eight clean sheets and conceding 17 goals in his 19 Premier League games.
Despite only recently joining, his agent, Enzo Raiola, has admitted the Italy international would like to return home in the future.
Speaking in an interview with Italian broadcaster Rai, Raiola said: "Today at Manchester City he is finding serenity with the team and the environment, and he likes the project very much. He is also starting to understand the English championship.
"The other day he told me jokingly that playing five or six years there is an adventure, but it was a joke... However, if there is the opportunity to return to Italy, we will take it."
Inter Milan and Juventus have both previously been interested in signing the former AC Milan ‘keeper.