Watch 5 live Final Score with commentary of Man Utd v Juventus
Dybala puts away Ronaldo cross to give Juve victory
United five points behind Juve in Group H
David Silva volley, Laporte header & Bernardo Silva strike put dominant Man City 3-0 up in Ukraine
City top of Group F
Shakhtar Donetsk 0-0 Man City
Shakhtar have a corner which is cleared by City and the Premier League champions counter with devastating pace.
Raheem Sterling plays a ball over the top for Riyad Mahrez one-on-one with Andriy Pyatov, but the Algerian drags his shot from the edge of the box wide of goal.
Real Madrid 1-0 Viktoria Plzen
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Shakhtar Donetsk 0-0 Man City
City continue to knock on the Shakhtar door, but the home side are holding firm.
Gabriel Jesus the latest to have a go with a turn and shot which sails wide.
Man Utd 0-1 Juventus
Phil Neville
Former England & Man Utd defender on BBC Radio 5 live
It was a devastaing counter-attack from Juventus. Cristiano Ronaldo made the run behind Luke Shaw and there was a gaping hole between him and Victor Lindelof.
Paulo Dybala rifles it in to the bottom right-hand corner.
Image source, Reuters
Paulo Dybala
First blood to Juventus.
It's not scored by Cristiano Ronaldo, but the Portuguese is heavily involved.
He swings a cross in from the right which Chris Smalling cuts out at the front post ahead of Juan Cuadrado.
But the ball breaks loose nicely inside the box for Paulo Dybala to slot in from eight yards out.
An uphill struggle for United from here, we've seen them come from behind against Juve before though.
Image source, Reuters
Image source, Reuters#bbcfootball or text 81111 (UK only)
Should be an easy night for Juventus
MikeyB (Utd Fan)
One of the main problems this season for United has been an out of form Lukaku. He's almost been a spectator at times and his finishing has been erratic.
Tim, London
Man Utd 0-0 Juventus
No friendships on show here.
Juve's France World Cup winner Blaise Matuidi clatters fellow countryman Paul Pogba from behind, earning United a free-kick.
Juan Mata swings the set-piece in which is met by the towering Pogba, but the header from 12 yards out is straight at Wojciech Szczesny.
Man Utd 0-0 Juventus
United do not look confident at the back, no wonder Jose Mourinho is desperate to sign a new centre-back.
Paulo Dybala starts the move and almost finishes it, sneaking in between Victor Lindelof and Chris Smalling but an attempted header skims off his hair and away from danger.
Lindelof and Smalling stare daggers at each other, who was supposed to pick him up?
It is goalless everywhere else at the moment, apart from at the Bernabeu where Karim Benzema has scored his 57th Champions League goal to give struggling champions Real Madrid the lead against Viktoria Plzen in Group G.
The Spanish giants lost to Levante at home last Saturday - their fourth defeat in five games.
Moments earlier, defender Sergio Ramos directed a header against Plzen's right-hand upright.
Stat: Benzema has scored for the 14th different season in the Champions League. Only Ryan Giggs (16), Raul (15) and Lionel Messi (14) have achieved this.
Image source, ReutersShakhtar Donetsk 0-0 Man City
Image source, .Shakhtar can't get out of their own half - City are dominating in Ukraine but it remains goalless.
Shakhtar Donetsk 0-0 Man City
Shakhtar carved open again, only a matter of time before City score.
The fleet-footed David Silva slips a pass through to Gabriel Jesus and the Brazilian is in on goal, but his shot is snuffed out by a advancing Andriy Pyatov, sharply off his line.
Man Utd 0-0 Juventus
Phil Neville
Former England & Man Utd defender on BBC Radio 5 live
United are going to play a counter-attacking style through Marcus Rashford and Anthony Martial.
It's a big night for Nemanja Matic, in behind Cristiano Ronaldo. He had a poor game at Chelsea and looked injured but he has started the game well here.
Man Utd 0-0 Juventus
A sniff of goal for Cristiano Ronaldo at the back post, peeling away from marker Chris Smalling but Juventus full-back Joao Cancelo's cross is a little too deep.
Warning signs for the United backline.
Image source, Getty Images#bbcfootball, 81111 (UK only)
Dylan Cleary: Love how a pitch invader is the best action to warrant a cheeky grin from Mourinho at Old Trafford.
DeathApeDisco: Let's see if Pogba deigns to put a shift in tonight.
Shakhtar Donetsk 0-0 Man City
It's all City in Ukraine.
Kevin de Bruyne is getting back into the swing of things, working a short corner and he tries catching Andriy Pyatov out at the near post, but the Shakhtar goalkeeper claws the ball to safety.
10 minutes in and the visitors have had 97% possession (ninety seven).
Man Utd 0-0 Juventus
Chris Bevan
BBC Sport at Old Trafford
That was all a bit weird. It took ages for the stewards to notice the pitch invader, who was desperate to reach Cristiano Ronaldo in the United area... but after running the length of the pitch he was rugby tackled about 10 yards from his goal.
Ronaldo did not seem too bothered and gave the fan a casual thumbs up as he was escorted from the field.
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Wahl Erik: I fully believe that Mourinho will prove the doubters wrong and bring back the glory days that us Man Utd fans have missed since SAF retired.
J, externalaylock: Finally Ashley Young will grow old by the end of this game marking CR7
Been awhile since there's been a Portuguese person all the United fans have adored at Old Trafford. Welcome home Ronaldo.
Jordan, Birmingham
Man Utd 0-0 Juventus
Phil Neville
Former England & Man Utd defender on BBC Radio 5 live
It is going to be a good battle down the Juventus left-hand side with Marcus Rashford and Alex Sandro going at it.
We've waited a while to see Cristiano Ronaldo getting involved in the game.
Image source, ReutersMan Utd 0-0 Juventus
"Mourinho's Red Army," sing the home supporters.
The fans are still behind him, despite what the media are writing.
#bbcfootball or 81111 on text (UK only)
It seems as if lately United have needed to concede a goal before reacting, maybe that ends tonight.
Andrew: Manchester United don’t have much impact on the bench. If Juventus take the lead tonight, United will find it hard to adjust and react.