Video assistant referees will be used in the Champions League and Europa League this season, Uefa has announced.
The technology was scheduled to be first used in the competitions from next season.
But Uefa says it will be brought in from the last-16 round in the Champions League and in the Europa League final.
VAR will also be used next year at the Nations Leagues finals and in the finals of the European Under-21 Championship.
“We are ready to use VAR earlier than initially planned and we are convinced that it will be beneficial for our competitions as it will provide valuable help to match officials and will allow us to reduce incorrect decisions,” said Uefa president Aleksander Ceferin.