Controversial video ref system set for Cup debut

Many officials still lack experience in nuances of game-changing technology

FLORENCE, Italy - The first time the referee makes a sign with his fingers and consults a screen on the sideline, the controversial VAR - video assistant refereeing system - will make its World Cup debut at Russia 2018.

After experiments in several FIFA tournaments, Serie A in Italy and the German Bundesliga this season, the technology is now well known in most countries.