Rangers and Celtic are set to be impacted by UEFA's overhaul of VAR and new refereeing guidelines that have been put in place for the Champions League group stage - including semi-automated offside technology.
The Scottish Premiership sides have both reached the tournament proper for the first time since 2007/08 season, with Ange Postecoglou's Scottish champions going straight into the group stage. Gio van Bronckhorst's men joined their city rivals to rub shoulder's with Europe's elite for the first time in a decade after navigating the qualifying rounds.
Ahead of Rangers' opener with Ajax and Celtic's first game with Real Madrid, UEFA chief refereeing officer Roberto Rosetti has unveiled a new set of guidelines that will be put in place this season - with semi-automated offside technology the most eye-catching as the governing body continue to build on VAR. The system was used for the first time in the Super Cup match between Real Madrid and Eintracht Frankfurt, but has been green lit to carry on throughout the top European competition.