At the end of VAR's toughest weekend since it arrived in the premier league, a former referee gives his opinion on the big decisions and the top flight has called for an investigation into the technology's use

Man Utd 3-1 Arsenal

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Dermot Gallagher believes the referee was right to disallow Gabriel Martinelli's goal, while Sue Smith and Stephen Warnock both thought the decision could have gone either way.
Dermot Gallagher believes the referee was right to disallow Gabriel Martinelli's goal, while Sue Smith and Stephen Warnock both thought the decision could have gone either way

Gabriel Martinelli scored the first goal of the game at Old United. It takes two minutes and 18 seconds for the VAR to rule out the goal. Odegaard tells Sky Sports it was not a foul and Mikel Arteta disagrees.

Two minutes and 43 seconds is the time taken by the VAR.

The decision was correct, according to De Reverend's verdict.

He thought it was a foul. It was obvious to me. He catches him down on the ground. I think it's a foul that he catches his knee with his leg. He had his hands in his back.

When the VAR looked at it, I was pretty sure it would be overturned. There wasn't a chance to reset in the early stages of the attack.

Everton 0-0 Liverpool

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Stephen Warnock feels Virgil van Dijk's challenge on Amadou Onana in the Merseyside derby could have been either a yellow or red card

Van Dijk catches Onana on the shin after he was beaten to a ball. The decision not to review the decision is made by the referee. Van Dijk should have been sent off for the incident, according to the manager.

The decision was correct, according to De Reverend's verdict.

He thinks it's a yellow card. The impact is on top of the foot. He doesn't have the speed or intensity because he is a short distance away. The bottom of the foot is the most important point.

It is a foul and a yellow card. I don't believe it is a red card. Last week against Wolves we saw a similar tackle where we agreed that it wasn't a red card.

Chelsea 2-1 West Ham

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Former Premier League referee Dermot Gallagher believes VAR confused the issue around West Ham's disallowed goal against Chelsea at Stamford Bridge and referee Andrew Madley should not have changed his mind.

Maxwel Cornet scored a stunning late goal for West Ham to bring them back into the game. The goal is disallowed after a long VAR review, during which Andy Madley is sent over to the review monitor for an alleged foul on Edouard Mendy, despite what appears minimal contact The decision was made in error, according to the manager of West ham.

Two minutes and 23 seconds is the time taken by the VAR.

The verdict was incorrect.

"I don't think there was a foul on Saturday and I don't think there was a foul now," he said. It became complicated because of the issues that were raised. If you watch the referee, you'll know what's happening. The referee has the best spot on the field.

He has everything in front of him, and he can see Mendy on the floor. He has everything he needs. When you go to VAR, you can be told to look at things from a different angle to make a different decision. He saw the same things when he went to the VAR.

I don't know what changed for him after seeing the same angle. The VAR felt that the goalkeeper was injured and that he didn't have the same feeling as Madley. That's what made a big difference in this. The goalkeeper on the ground was the one who made the decision. The VAR thought the goalkeeper was injured.

Should VAR be scrapped?

Former Premier League referee Dermot Gallagher: "No. I talk about half-full, half-empty glasses. Think of all the decisions it's rectified, or got right. The offside at Brentford would've been disallowed before VAR, quite clearly an understandable error.

"The ones we talk about that haven't been given, they wouldn't have been given without VAR either. As we saw with those two decisions [at Chelsea and Newcastle], it's about where we're going to go, how we're going to make it better. Make it better, don't kick it out."

Newcastle 0-0 Crystal Palace

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Speaking on Ref Watch, former Premier League referee Dermot Gallagher believes Newcastle's controversial disallowed goal against Crystal Palace should have been a penalty - not a goal or a disallowed goal

Tyrick Mitchell's own net was hit by a Kieran Trippier free- kick. After VAR sends referee Michael Salisbury to the review monitor, he changes his decision and disallows the goal for an alleged foul by Joe Willock on Victor Guaita, even though he appeared to be pushed into him by Mitchell. The decision was made in error.

The time was taken by the VAR.

The verdict was incorrect.

When the VAR looked at it, he focused on the point of Willock going into Guaita as he was going to clear the ball and it looked a foul. He hasn't focused on the entire outcome. The foul occurred if he looked at Mitchell's arm.

All sorts of issues are raised by it. The best refs don't close their options. I don't think you can give a goal if the ball isn't in the net when Willock collides with the goalie.

I believe he could give a penalty for Mitchell pushing Willock. I think it's the worst option he could have taken. The option has arisen because he wasn't able to see the whole incident.

Brentford 5-2 Leeds

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Former Liverpool defender Stephen Warnock feels Leeds were denied a blatant penalty against Brentford

There is no review of the incident after Ivan Toney was given a penalty after a VAR review. Jesse Marsch was sent off for gesturing at the referee. The two decisions were called a lack of respect by him.

De Reverend's opinion: "Maybe"

The initial shirt pull is not seen by the referee. The VAR can't act because it's outside the box, and once he gets into the box he releases the shirt.

The dilemma we've been having is what the threshold is. It would have been a penalty if the player still pulled the shirt into the box.

He is looking at whether the player clipped him on the foot or moved forward. You cannot give a penalty for a 'Maybe'.

There is a question on this point. The officials thought it didn't hit the threshold so they continued. The referee didn't need to refer to the VAR because he had a perfect view. He doesn't think about a penalty.

How can VAR be improved?

We asked for your comments on skysports.com...

Clark: VAR should be used like NFL team challenges, with three per game for each team. Otherwise it shouldn’t be used at all. It’s spoiling the flow and ruining players' goal/assist records, plus the fans have no clue.

Wilber73: VAR officials should be in the stadium!

PscNUFC: VAR needs to be run by ex-players and managers who know the game inside out and can make the right call.

Suhail Gulati: Since VAR is to intervene for "clear and obvious" errors only, give it a time frame, say 30 seconds. If the error is blatant then it shouldn't take long.

Barr: When the ref goes and looks at the monitor, the replays should be shown in normal speed not slowed down.

Brighton 5-2 Leicester

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 Alexis Mac Allister makes it 3-2 to Brighton before the goal is ruled out for offside by VAR
Ex-referee Dermot Gallagher thinks Alexis Mac Allister's wonder goal for Brighton was right to be chalked off, but Stephen Warnock and Sue Smith would have liked to have seen the epic strike stand

Two minutes after half-time,Alexis Mac Allister scored a 30-yard thunderbolt to give BRIGHTON a 3-2 lead over LEICESTER In the build-up to the goal, Enock Mwepu's attempted overhead kick is reviewed by the VAR and it is decided that the goal was in fact an incorrect one.

The time taken by the VAR was four minutes, 31 seconds.

The decision was correct, according to De Reverend's verdict.

The problem was that they had to determine if the player was in an upright position. If he impacts the defender's attempts to head the ball out, that's the next part.

The referee is the only one who can make that decision. The referee is sent to the screen to decide if the overhead kick reduces the defender's ability to head the ball clear.

It's a shame that I agree with him because it's such a great goal. The defender doesn't get a good connection because his boot is very high.

He has to be on the other side of the floor. They had to go through each step. One of the best goals you'll ever see is unfortunate.

Aston Villa 1-1 Man City

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Aston Villa's Philippe Coutinho had the ball in the net during their 1-1 draw with Manchester City, but the officials had incorrectly decided before he struck the ball that the Brazilian was offside

Philippe Coutinho was denied what appeared to be a perfectly fine goal for an error in judgement. The assistant referee's flag can't be overruled by the VAR because the whistle has already gone.

The verdict was incorrect.

The assistant made a mistake and I don't think the referee made a mistake. When he's not on the field, the assistant has flagged.

"Referees are encouraged to let the game flow, but keep in mind that Coutinho came back six, seven or eight yards to retrieve the ball."

You're always going to whistle if the referee sees an assistant's flag at that point.

The whistle had stopped by the time he shot.