This is the first time that the Video Assistant Referee (VAR) system will be used in the Champions League and will debut at Old Trafford and the Stadio Olimpico on Tuesday.
The Video Assistant Referee (VAR) system will be introduced in the UEFA Champions League for the first time ever coinciding with the the Round of 16 fixtures and is set to make it's debut in the Manchester United-PSG and AS Roma-FC Porto ties and all subsequent games in the competition.