If Europe seeks a new political constitution, though, a dramatic lurch towards a rejectionist or extremist party on one country could lead to a break-up of the club.

ECONOMIST: The euro crisis

The police had been trying to break up fighting between rival fans from Lazio and Turin club Juventus.

CNN: Insider's guide: Italian football violence

The 29-year also found himself in trouble for breaching disciplinary rules for club and country following the break-up of his marriage.

BBC: Boruc admits to personal problems