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During the course, the referees were given guidelines and instructions to take into the new campaign, especially in relation to VAR, which will be deployed from this season's UEFA Champions League play-offs, as well as at the EURO 2020 finals next summer. "The final decision in a VAR intervention will always be down to the referee," Rosetti said. "The referee remains the leader on the field, and will be at the centre of the decision-making process." Protecting players and football's image remains essential. "We have a duty to protect players from reckless challenges, serious foul play and violent conduct which endangers their safety," said Rosetti, "and we have reminded the referees of their duty in this respect." 
Rosetti outlined the advantages of the VAR system, and emphasised that the work on fine-tuning the system will continue apace. "We only want to see VAR interventions when the video assistant referee has clear video images which prove a clear and obvious mistake by the referee," he explained. "The aim is for a situation with VAR where maximum benefit is derived with minimum interference. We will also be working to reduce the amount of time taken when the referee reviews an incident on the screen at the side of the pitch. Of course, we want accuracy, but we also want to minimise the amount of time that a match is interrupted. "An example of the result that we are aiming for with VAR came in the semi-finals and finals of last season's UEFA Champions League and UEFA Europa League – there was not one VAR intervention in these matches, and that's exactly what we want to achieve.