INTER MILAN have been left reeling after it was revealed Roberto Mancini was attacked by one of his own players earlier this season.

Celtic face the Serie A giants in the San Siro this week confident they can grab a win, which would be enough to see them through to the last 16 of the Europa League.

The Italians have already been rocked by the bust-up between Nemanja Vidic and Mancini with the Serb's apparent reluctance to come on as a sub in the pulsating 3-3 draw in the first leg at Parkhead.

Now current vice-president and club legend Javier Zanetti has revealed it's not the first clash fiery former Manchester City boss Mancini has had this season.

But this incident went much further after Dani Osvaldo - who was quietly shipped out on loan to Boca Juniors earlier this month - and Mancini actually came to blows after a 1-1 draw with Juventus, according to Zanetti.

He said: "Was I more angry or disappointed by Osvaldo? More angry, but he was angry with himself too.

"He realised that trying to lay his hands on the manager was a serious mistake. He wasted a great opportunity in his career."

And Zanetti also had some words of advice to Inter's star striker Mauro Icardi, after he had a alteration with his own supporters.

He said: "It is up to us to help him understand how you have to behave in a big club.

"The first thing we always say is we must have respect for the fans. It was an unpleasant incident."