UEFA has confirmed that it is looking into introducing video assistant referees to the Champions League.
Following its use in the 2017-18 Bundesliga and Serie A campaigns, VAR was implemented at a World Cup for the first time in Russia this summer.
European football's governing body will be using trials to find out if it can overcome logistical problems that may impede usage.
"UEFA is constantly looking at ways in which it can improve its competitions and we are looking closely at the implementation of video assistant referees that are currently being trialled in various competitions," an official statement read.
"We still see several uncertainties regarding the implementation of VAR and we think it is extremely important that the scope of application, interpretation and technological support are clear to all - including spectators - and fully proven.
"The implementation of VAR on a European scale presents a number of difficulties in the operational, logistical and refereeing areas. Any decision in this respect would require careful assessment of the available solutions and resources needed."
Numerous reports have suggested that VAR could be used from the quarter-finals of the competition onwards.
