Group D leaders Zenit deservedly go in a goal to the good at the interval but they haven't had it all their own way as Dundalk have enjoyed their share of possession and created some good chances of their own.

Sow's stunner. Rooney's poor touch. Pogba limps off. Tempers flare. Jose unhappy. 

Image source, Reuters / Getty / EPA

Almost like going back to the Louis van Gaal days...

Paul Salmon: Pogba's injury might be the best thing for him. Time out of the spotlight without Mourinho having to drop him.

Huddy: Things are starting to get a little heated...

V@zu: Being a United fan, I feel Kroos or Modric would have operated much better than Pogba and now the injury, Geez

And there's the half-time whistle. 

It could have been worse for Manchester United after that early goal for the hosts and Paul Pogba's injury, but with the chance to regroup at the break they may fancy their chances of getting back into this.

Actually, those boos appear to be for Zlatan Ibrahimovic. The home fans are not letting him off lightly after that earlier coming together with Simon Kjaer.

Jeers from the home crowd as Manchester United attack with the 45 minutes up. They want the half-time whistle but Zlatan Ibrahimovic's ball into the box is too close to the keeper and again the hosts break quickly and Moussa Sow heads just over from Alper Potuk's excellent cross to the far post.

Dele Onipede: Can't Man Utd formation be changed for once? This is too narrow

Jason Moore: Poor poor choice to bring Ibra on after his struggles in front of goal. Should have been Mata 

Dan Goude in Manchester: Just not working out for Pogba so far at United. I wonder if he's starting to regret his decision to join them. 

Volkan Demirel races out of his box to get in the ear of referee Milorad Mazic after a foul by Wayne Rooney. Mazic is having none of it, and shows the Fenerbahce keeper the yellow card.

A bit of a kerfuffle as Zlatan Ibrahimovic catches Simon Kjaer's foot. The defender is not happy with challenge and tells Ibrahimovic as much. prompting the Swedish striker to grab Kjaer. Tempers flaring, I'll be surprised if there isn't a red card in this game.

Image source, Reuters

David de Gea hasn't had a save to make but Manchester United need to be careful of the Fenerbahce counter as Hasan Ali Kaldirim beats the offside trap to get away on the left. He crosses but it is beyond the waiting Moussa Sow.

Image source, Reuters

Bold call from Ken here. Can Jonjo do the dab?

Dundalk survive some sustained pressure from the Russians as Oleg Shatov's left-foot drive cannons off Dane Massey and Giuliano fails to convert a gilt-edged opportunity. 

NthrITguY: Liverpool n watford have conceded more in league and still above united. Problem is not only defense

Peter Malath: I find it funny that Man UTD think they can win the @EuropaLeague with how they play now days. & I am a United fan for 19 yrs

Mike Crew: How is Daley Blind a professional footballer, never mind a Utd player, he's absolutely rubbish! 

Zlatan Ibrahimovic has injected a bit more life into Manchester United's attack and he creates the visitor's best chance of the half as he feeds a pass for Marcus Rashford and the forward charges into space on the right side of the area. He lets fly with a stinging shot that Volkan Demirel pushes away and the defence clears before Ivrahimovic can tap in the loose ball.

Better from United.

Now Manchester United can make the substitution so off goes Paul Pogba and on comes Zlatan Ibrahimovic. He goes up into the centre of attack, with Wayne Rooney dropping behind.

Image source, Reuters

Bad news for Manchester United as Paul Pogba limps off. Manchester United can't make the subsitution quick enough and they are almost caught on the counter while down to 10 men as Daley Blind loses possession and the hosts break. Jeremain Lens goes for the spectacular with an attempted volley from the right but, fortunately for Manchester United, misses his kick.

Manchester United are playing very narrow but they finally get the ball out wide as Wayne Rooney drops deep to pick up a pass before spraying a pass out to Matteo Darmian on the right. He crosses for Paul Pogba, who gets into the space vacated by Rooney, but Fenerbahce clear again.

Steve Rodgers: That's the kind of first touch that Rooney's been making for the past 2 years.

El Sizzy: Rooney has truly lost it 

Image source, Getty Images