The purpose of the yellow card is to act as a deterrent to the goalkeeper not to encroach from the goal line
before a penalty is taken.
An Aston Villa shot was heading towards an open goal when Justin raced back and kicked the ball off the goal line
and out for a throw in.
The technology, which tells match officials if the ball has crossed the goal line
or not, has been used in the Premier League since 2013, as well as in some League Cup ties and the EFL play-off finals at Wembley.
"The main task of the AARs is not to control the goal line
and decide whether a ball has crossed it; rather they are responsible for monitoring everything that is happening in the penalty area overall, aiding the main referee in making important decisions in the box." Goal-line technology will be used in every Champions League match from the play-off round onwards next season and could also be introduced for the Europa League group stages, UEFA said.
Not just for goal line
decisions but also for penalties, off-sides, red cards, and so on."
line technology will be used to determine whether or not entire ball has crossed over the goal line
in a match.
Had an extra linesman at least been near the goal line
he would surely have indicated a goal as the ball was slow moving at the time.
And in line with England's history of controversy with goal-line incidents, London bookmakers have immediately quoted England at 66-1 to have a goal awarded by goal line
technology at the 2014 World Cup.
However, goal-line technology is not favoured by European soccer's governing body Uefa, which instead prefers to employ two extra linesmen, one on each goal line
. Fifa president Sepp Blatter has already said that extra linesmen are unlikely to be used at the World Cup.
The data from the cameras is fed into a central processing unit that analyses the position of the ball relative to that of the goal line
. If the system recognises that the ball has crossed the goal line
, it relays that information in less than one second to devices worn by officials on the field of play.
Gary Lineker re-tweeted Blatter's message, adding his own comment of: "Always ahead of the game eh?" He later posted: "Get the sense even my old friend Michel Platini might start favouring goal line
technology, now the lack of it, has helped England."
A replay of the shot showed that the ball clearly crossed the goal line
before Terry kicked the ball out of harm's way.