Former Italy star Aldo Serena has slammed Napoli over their treatment of Piotr Zielinski.

Napoli have left the Pole out of their Champions League squad as he will be leaving when his deal expires at the end of the season.

The decision has left Serena unimpressed, who told Radio Deejay: "As a professional I would have been offended.

"I often changed teams but I gave my all and I happened to get hurt in the last few games.

"I tell Zielinski to hold on, it's a choice that I don't agree with and I find it offensive."