Alex Moreno returned from a six-month injury lay-off to score the winner as Aston Villa beat Legia Warsaw and moved above them at the top of Europa Conference League Group E.

Emery’s team had led through Moussa Diaby’s first-half drive, before being pegged back as Ernest Muci took advantage of Boubacar Kamara’s stray pass at the back.

Despite the jubilation, news filtered through that missiles were thrown at police outside the ground before kick-off, resulting in Legia supporters not being allowed to enter the stadium.

Villa had already qualified before kick-off, thanks to AZ Alkmaar’s win over Zrinjski Mostar earlier in the day, but they couldn’t find a third goal which would have sealed top spot in the group.

Despite that, the narrow victory over the Polish side means Emery’s side only need a point at Zrinjski on matchday six to progress as group winners.

Thursday’s win is Villa’s seventh in a row at home in all competitions since the Carabao Cup defeat by Everton, and they started the match at a pace that illustrated that form.

With their very first attack Diaby cut inside on his left and finished clinically, before Ollie Watkins’ replacement Jhon Duran saw a couple of efforts thwarted by Legia goalkeeper Kacper Tobiasz.

Muci then levelled for the visitors with a sublime curled effort following Kamara’s rushed pass from the edge of the box, which appeared to take the sting out of the hosts.

Emery’s team had to win by two clear goals to guarantee top spot on the night, and the pace at which they approached the second half was indicative of that knowledge.

Legia defender Gil Dias struck the bar with a looping header soon after the restart, but after Moreno’s superb improvised volley at the back post edged Villa ahead, it was the home side who dominated proceedings.

Substitute Leon Bailey thought he had got the all-important third goal when he lofted the ball over Tobiasz in the dying moments, but the ball rebounded off the underside of the bar and the goalline before spinning away.

‘He is important’ – Emery on Moreno

Moreno was forced off with a hamstring injury in Villa’s 1-1 draw with Liverpool back in May and hadn’t featured again for them before Thursday’s match.

The full-back has been involved in matchday squads in recent weeks but such has been the form of Villa – Emery’s team sit fourth in the Premier League – he has not been able to take game time away from Lucas Digne.

The 30-year-old was given the nod against Legia and repaid his manager’s faith with the decisive goal, before a standing ovation greeted him when he was substituted on 78 minutes.

Emery said: “He is very important. Alex Moreno was very excited and wishing to play.

“He scored one goal and now we can have more players being ready and available to help the team.”

Diaby added: “I am very happy for Alex. He has a big injury and we know Alex is a good player, a good person. I am very happy for him that he scored the second goal and this goal won us this game.”

Villa condemn pre-match trouble

In a statement on their club website, Villa confirmed that no Legia Warsaw fans were allowed into the stadium, adding that some police officers had been injured during the disorder.

“In spite of numerous requests for cooperation from Legia Warsaw concerning their travelling supporters, especially in the last two days, no assistance on the serious safety matter of away fans attending Villa Park was forthcoming from the visiting club,” they said.

“The club has repeatedly, including this morning, raised concerns in conjunction with Uefa and all the relevant authorities to Legia that ticketless away supporters were attempting to attend Villa Park.

“Approximately an hour before kick-off, Legia fans engaged in planned and systematic violent acts against West Midlands Police officers and a decision was then made by West Midlands Police to exclude all Legia supporters.

“Aston Villa strongly condemns the behaviour of those visiting supporters and would like to thank West Midlands Police for their professionalism in very difficult circumstances.”

After the match, Legia manager Kosta Runjaic was asked about the pre-match trouble.

“I think its a different topic, it’s not my business,” he said.

“I’ve been in a big focus to lead the team. We represented Polish football in a good way, all other things outside the stadium I don’t want to comment.

“We have great fans, they support us home and away. We can always count on them. So far since I’ve been at Legia I’ve had a good experience with our fans. I don’t know the content of it all happening.

“I don’t know the details, which is why it’s better I don’t speak too much about it. Unfortunately our fans weren’t in the stadium and the atmosphere would have been better.

“It’s not about the fans, it’s a pity but we can’t change it.”