Juventus pulled, dragged, kicked and screamed their way to a rugged and devilishly effective 3-0 win last night at Celtic Park despite a spirited and gutsy performance from the home side.

Celtic's gaffer, Neil Lennon, was pleased with the way his side took the game to the Italian giants, despite the eventual score line, before the former Hoops player raised questions about the games officiating.

Why was Stephan Lichtsteiner allowed to manhandle anyone who came within three feet of his goalkeeper at every corner, and where was the call from the supposedly effective extra official on the goal line?

Similarly, Juventus could have been denied their opening goal of the game after three minutes were it not for Claudio Marchisio and his presence of mind to drill home a second attempt on goal, after Alessandro Matri’s initial strike was cleared from behind the line.

We see them on the continent, on both Champions League and Europa League nights, but have we ever seen them actually do anything?

Holding what appears to be a vibrating baton in their hands, they were meant to be the difference makers in our beloved game, the ones to help bring another level of justice and rule enforcement to the sport.

But instead they bring frustration to fans, players and managers alike and despite the obvious use of another pair of eyes for any incident that takes place around the 18-yard-box, they cause more controversy then they solve.

The additional officials' big mistake last night may not have been as criminal as the penalty shout Mario Balotelli had for Manchester City in the final seconds of their tie against Ajax last November, but it could well have been.

When Matri tucked the ball underneath the flailing Frazer Forster few thought Kelvin Wilson would be able to scramble the ball away before the ball crossed the line.  He didn’t, yet play continued after Wilson’s desperate clearance.

Thankfully for Antonio Conte's side, Marchisio was on hand to fire the ball into the Celtic goal for certain and midway through the first half websites, television networks and twitter feeds updated the scoreline to read that Matri was the scorer. But had Marchisio not been there to ensure the ball hit the back of the net, would play have been pulled back?

We heard no whistle, saw no movement from the additional official until the Juve #8's strike hit the roof of the net, and had Celtic cleared the ball away, Juve could well have  been denied their third minute advantage.

They've come under plenty of criticism throughout their inception in the sport, but both Matri’s goal and the lack of action taken against Lichtsteiner in his continuous battle with Gary Hooper at every Celtic corner, highlight just how ineffective the two extra pairs of eyes are along the goal-line.

The extra official experiment has been in place since 2008 and has grown from being used in European Under-19 Championship games, to being used in all major UEFA competitions, and the governing body see it as being a success.

Fans and pundits, however, beg to differ, with many of us unable to remember a time when we’ve seen the extra official do little more then look fearful in the face of adversity.

There was once an incident in last year's Europa League Final when Mark Clattenburg waved his stick and shook his head during to indicate there was no foul or penalty kick to be given, but the Englishman is the only additional referee to have seemingly made a big decision on a pitch.

They need guts, or we need technology because at the moment, anyone could be a UEFA match official.