Career
Vassaras is a linguist, being able to speak Greek, German, English and Spanish. Vassaras became a Fédération internationale de football association referee in 1998, and refereed his first senior international in 1999, in a match between Austria and San Marino. That same year, he was selected as one of the referees for the Fédération internationale de football association World U-17 Championships in New Zealand.
He was named as a Union of European Football Associations Elite Referee in 2004 and, since then, has officiated matches in the Union of European Football Associations Champions League, the European Championships and the Olympic Games.
He currently works as the Head of the Referee Committee for the Romanian Football Federation.