Sections of AC Milan fans were left furious when they allowed one of their best players to leave for Barcelona at the start of last season.
They will be even more antagonised after the 25-year-old joined local rivals Inter on the opening day of the World Cup.
A row with former-manager Fatih Terim was blamed for the talented midfielder's departure to Spain.
However, on arrival at the Nou Camp, he failed to hold down a regular first-team spot.
Nevertheless, Italy manager Giovanni Trapattoni insisted he already knew enough about Coco's qualities to include him in the squad.
As early as March, Trapattoni hinted at his intention to take Coco to the Far East.
"Coco is not playing at Barcelona, but I know that after 20 days with us he will be in top condition," he said.