Claudio Circhetta
Claudio Circhetta (born 18 November 1970) is a Swiss former football referee.In 2000, he was promoted to referee matches in the Swiss Super League, and five years later he became a FIFA-listed international official.His first Champions League group stage appointment was a match between Celtic and Villarreal on 10 December 2008.His most prestigious appointment was as fourth official in the 2009 UEFA Champions League Final, alongside referee Massimo Busacca.He retired at the end of 2010 to take up the position of Swiss referees chief.