The two played alongside each other at the World Cup in Germany and Kaka finds it hard to believe that Adriano does not merit a place in Roberto Mancini's Inter side.

"I believe that Adriano should always play," said Kaka. "Regardless of the fact that he is a friend of mine, he enriches football and I don't like to see him in the stands without playing, it means wasted talent."

Adriano was one of the top strikers in Serie A two years ago but he scored just five goals in 23 league appearances for the Nerazzurri last season.

He had been linked with a move abroad this summer after a dip in form but has remained at Inter.