FIFA President Sepp Blatter has advised players against walking off the pitch if they are subjected to racist abuse.

It follows AC Milan's decision to refuse to play on in a friendly against Pro Patria this week when former Tottenham and Portsmouth player Kevin Prince Boateng was targetted by fans.

The Italian football federation has opened an inquiry into the incident.

In comments last year Blatter suggested that players who suffer racist abuse from an opponent should shake the perpetrator's hand after a match.