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Arsenal manager Unai Emery suggested that video assistant referees (VAR) could not be introduced to the Premier League soon enough, after his side's incident-packed 1-1 draw with Tottenham Hotspur in the Premier League on Saturday.
After taking an early lead through Aaron Ramsey, the Gunners held Spurs off for nearly an hour before Harry Kane, challenging to get on to the end of a free kick, was judged to have been brought down in the box by Shkodran Mustafi.
Kane converted that penalty but video replays showed that the England striker had actually been offside when he was fouled.
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Emery did not complain about the decision directly, but he suggested that VAR might prevent game-changing decisions going the wrong way.
"Today for me, the referees were a big personality but it's not enough to make the best decision in difficult action in the box, for them and for us," he told reporters after the match.
"I think VAR is coming to help them to be fair for one match like today."
"It's very difficult for them to watch in the moment one action like that. VAR is coming to help them to be fair for this decision. And I think it's positive for football in England," he added.
VAR, which was used in the World Cup last year and is use in major leagues across Europe, is set to be used in the Premier League next season after clubs agreed in principle to introduce the technology.
Overall, Emery felt his side had done enough to win the game and had played well together.
"I am proud of our players. You can win, you can lose, you can draw, but above all it's playing like a team," he said.
"We could win this match. We played today with a big collective spirit."
For his part, Spurs boss Mauricio Pochettino said VAR would probably help match officials but the important point would be how the technology was applied.
"Some situations are difficult for referees to handle, to manage, we can't think that it will be the key for football to be fair," he said.
"Of course the key will be how we use the VAR. Important work for the future, to be sure, it will be a massive help."
But he added that no amount of technology would ever completely put an end to arguments over refereeing decisions.
"Football has never been fair, and it never will be fair," he said.
Tottenham Hotspur boss Mauricio Pochettino has bemoaned referee Anthony Taylor's failure to punish Granit Xhaka for an early challenge on Harry Kane during Saturday's north London derby.
Xhaka felled Kane with a knee-high sliding tackle from behind shortly before Aaron Ramsey's 16th-minute opener, and Spurs' manager feels action should have been taken.
It follows Pochettino's criticism of Michael Oliver last month, and his spat with Mike Dean at Burnley last weekend, after which he was charged with improper conduct.
"Sometimes we focus on a few actions, but I think the action that changed the game was after 12 minutes -- the action from Xhaka to Harry Kane that wasn't even a foul," said the Argentinian. "That was the action that afterwards changed everything in the dynamic of the game.
"This season we are so unlucky with decisions that affect us in a negative way, like against Manchester United -- [Paul] Pogba should be sent off, Harry Kane got an injury when it was a clear foul on the edge of the box but no foul.
"We keep on going in many, many, many situations but you know, I hope we get to the end of the season and next season change maybe, and we have more luck in the future.
"It should have been yellow, amber or even red [for Xhaka], but it wasn't even a foul.
"If the foul was for us we could have scored a goal. If it's a yellow card the aggression of the player drops. Amber, well we don't use amber. Red and it's clear you'll have an advantage.
"But please make it an exercise to watch this action and afterwards we can talk about whether [Harry Kane] was offside [for Spurs' penalty], a penalty or not and different decisions, if [Lucas] Torreira should have been sent off in the final minutes.
"If you score in the first second of the game, maybe you win 1-0. It can be decisive, not only the actions at the end, if you are going to win a game."
Having come from behind to level the game at 1-1 against Arsenal, Spurs conceded a late penalty, only for captain Hugo Lloris to deny Pierre-Emerick Aubameyang from the spot.
The Frenchman had been partly at fault for both of the goals scored by Chelsea in the midweek defeat at Stamford Bridge, but he made amends at Wembley.
"It wasn't only [him who had] a bad night on Wednesday -- the whole team, not only Hugo," said Pochettino. "You put the finger on Hugo as responsible for the defeat. It was not him, I cannot blame him.
"Hugo is one of the best in the world. He does not need to show that. He cannot prove nothing, but the finger always points at the big players like Hugo, or if Harry misses big chances."
Lloris's penalty save ensured Tottenham maintained their four-point cushion above Arsenal in the top-four fight.
"Was it more than a draw? If you assess the game I think we were better than Arsenal in all the aspects," said Pochettino. "But of course in the way that it finished -- with the penalty missed by Arsenal and the action that we didn't get after, because it was a clear penalty on Harry Kane -- from lose to win, maybe.
"To concede after 15 minutes was tough for us. But of course I'm so happy with the character, the personality and the way that in the end we played.
"It wasn't great, our performance, but it was very good to draw and then maybe deserve to win. After two defeats it was important today to build again our positive ways.
"We have a very difficult game on Tuesday against Borussia Dortmund and arriving in a better condition than we arrived today is going to be key."