On Sunday night it will be a very tense atmosphere at San Siro, as Cassano and Giampaolo Pazzini swapped places in August.
Agent Beppe Bozzo told TMW: "Yes, he probably will be jeered, but the fans should also remember that Antonio contributed to Milan's most recent Scudetto. There will be talk of who got the better deal in this exchange, but the truth is at the end of the day it was a good move for all concerned.
"Will Cassano celebrate if he scores? It's a personal matter and I really don't know."