WATCH: VAR explained as it makes Champions League debut

Cape Town - UEFA president Aleksander Ceferin has warned that there will be no more excuses as Video Assistant Referees (VAR) make their debut in the Champions League starting this week.

WRAP: Champions League

The system which was used during last year's FIFA World Cup, and is now widely called upon in most of Europe's leading leagues, was initially set to be rolled out in the Champions League from the start of next season.

However, it will now make its debut six months earlier than anticipated.