Video Assistant Referees will be used at this summer's Nations League finals, Uefa has announced.
After a successful introduction into Uefa's club competitions in the Champions League knockout stages and Europa League final, the system will be used during this week's competition involving England, Holland, Switzerland and hosts Portugal.
A VAR team will be based at each stadium to support the referee and check for "clear and obvious" errors relating to goals, red cards, penalty-box incidents or mistaken identity.
The head coaches of the four participating nations were briefed in April by Uefa's chief refereeing officer Roberto Rosetti to prepare for the use of VAR at the finals.
England coach Gareth Southgate said: "We had positive experiences of VAR in the World Cup.
"My feeling both internationally and domestically is that, in the main, the big decisions have been right. The purpose of using VAR is to help the referees so I think it has been a help.
"You will never get a system that is 100 per cent fail-safe but the key decisions that are clear and obvious have been rectified. For me, that is a positive."
Portugal's Fernando Santos hailed the system as "a step forward for all people who love football and fair play", but Holland boss Ronald Koeman said: "I am in favour of the VAR tackling the big, obvious issues only, rather than to search endlessly for potential errors."
Switzerland's Vladimir Petkovic stressed: "It is important that in the end it is still man who decides, not a machine."
Video Assistant Referees (VAR) technology will be used in the knockout stages of this season's Champions League and Europa League competitions.
European football's governing body confirmed the move following the meeting of its executive committee in Dublin.
VAR will also be used at next summer's Nations League Finals - which will feature England as well as Portugal, Holland and Switzerland.
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No Britons have been selected in the list of 13 specialised video assistant referees named by world governing body FIFA for this summer's World Cup.
FIFA said "the selection criteria for the VARs was primarily based on their experience as video match officials in their respective national associations and confederation competitions, in addition to their successful participation in several preparatory seminars and FIFA competitions, where they enhanced their VAR knowledge and skills by using the system".
The VAR system has generated lots of debate in its worldwide trials, with some arguing it has created additional controversy over decision-making rather than reducing it.
England is the only one of the home nations to have qualified for the tournament. But there will be no match officials from England, Scotland, Wales or Northern Ireland, nor the Republic of Ireland, who also failed to qualify, at Russia 2018.
Englishman Howard Webb was the World Cup final referee at South Africa 2010 and was England's referee representative at the Brazil 2014 tournament.
FIFA has selected 36 referees and 63 assistant referees - 10 referees and 20 assistants are from European governing body UEFA - and some of these officials will also be given VAR appointments prior to matches, the world governing body said.
The VAR team will be located in a centralised video operation room in Moscow and has access to all relevant broadcast cameras and two dedicated offside cameras, FIFA states on its website.
There will be one VAR and three assistant VARs for each match at the tournament, which begins when hosts Russia play Saudi Arabia in Moscow on June 14.
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