Result: Man City 3-1 Barcelona
Gundogan (2) & De Bruyne after Messi opener
Result: Ludogorets 2-3 Arsenal
Xhaka, Giroud & Ozil help Arsenal hit back from two down
Arsenal qualify for last 16
Result: Borussia Monchengladbach 1-1 Celtic
Is this a glimpse of City's future under Guardiola?
What message does it send to the rest of Europe?
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Antoine Griezmann scored a last-second winner as Atletico Madrid qualified for the Champions League last 16, alongside Group D rivals Bayern Munich.
Robert Lewandowski scored twice, and hit the woodwork three times, as Bayern came from 1-0 down to beat PSV 2-1.
Griezmann's late second handed Atleti a 2-1 win over Rostov.
PSG won 2-1 in Basel, with Thomas Meunier scoring a late volley as they went through alongside Arsenal.
Image source, Getty ImagesAtletico Madrid 2-1 Rostov
This is the stuff. If you keep on huffing and puffing, good things can happen.
Rostov have had three touches in the Atletico Madrid area (right). Atletico have had 31 shots at goal and get their reward - Antoine Griezmann with the injury-time winner.
Image source, .Manchester City 3-1 Barcelona
Ally McCoist
Former Scotland striker on BBC Radio 5 live
Absolutely excellent second-half from City.
They were fortunate to go in level at half-time, but boy did they play second-half.
They thoroughly deserved their victory - two great goals - and in Ilkay Gundogan, they've now got someone in the middle of the park who will get forward and score goals.
Image source, ReutersPep Guardiola's Manchester City are a win away from securing their place in the last 16. Realistically a point at Monchengladbach would probably do it but they could, in theory, still be caught by Celtic.
Manchester City 3-1 Barcelona
Simon Stone
BBC Sport at the Etihad Stadium.
As the final whistle went, Manchester City's bench erupted. The players darted onto the pitch to embrace their team-mates. The coaching staff hugged each other jubilantly.
Only one man did not join in.
Pep Guardiola shook Luis Enrique's hand, turned, adjusted his tie, and headed down the tunnel.
This most expressive of men, showed less emotion than anyone at such a monumental achievement.
Image source, Rex FeaturesA last-minute goal from PSG in Basel means that Arsenal and PSG are into the last 16. Done and dusted with two games to spare,
Borussia Monchengladbach 1-1 Celtic
Image source, ReutersLudogorets Razgrad 2-3 Arsenal
Goonerama: Mesut Ozil has officially added finishing to his game. Get in!
Henry Ice: Safe to say Ozil this season will be assisting the ball into the back of the net ! Absolutely stunning goal that!
Ludogorets Razgrad 2-3 Arsenal
Stephen Fenton: What a cool finish from Mesut Ozil!!! Could be so important! COYG!!
Gautam: Take a bow..Mesut Ozil That's a masterclass.
Nick Clohessy: That Ozil goal was sheer class. Lionel Mesut right there.
Let us know your thoughts at #bbcfootball on Twitter.
Ludogorets Razgrad 2-3 Arsenal
Image source, ReutersManchester City 3-1 Barcelona
A famous win for Manchester City and a very impressive one.
Image source, ReutersManchester City 3-1 Barcelona
Three minutes added on at City.
Borussia Monchengladbach 1-1 Celtic
Lots of love for Celtic's goal-scorer Moussa Dembele tonight... Can the Scottish champions score a last-minute winner to claim three points?
Sam: Moussa Dembele is class.
James Patrick: Dembele is an absolute beast.
Paddy Brady: I'd be amazed if Dembele is at Celtic next season..
Get involved at #bbcfootball on Twitter or text 81111.
Image source, Getty Images
Mesut Ozil (87 mins)
Oh that is just superb! The Ludogorets defence are taught a lesson by Mesut Ozil as he scores the goal that will surely seal qualification tonight. One pass over the top is enough to free him but he has an awful lot to do. He chips the ball over the head of keeper Milan Borjan, comes back on to his left foot, has two defenders on him but sits them both down, one at a time, with some outrageous close control and composure before firing into the empty net.
A great goal.
Image source, Rex FeaturesLudogorets Razgrad 2-2 Arsenal
After a crazy first half the second 45 in Sofia has been a bit tame to be honest. Arsenal are not going through as it stands but they will stay top of Group A.
Jack Beardwell: Oh. My. God. Ladies and Gentlemen, we have seen 'the Pep effect'.
Daniel Woodley: This is a statement of intent by Man City tonight. Taken the game to Barcelona second half and thoroughly deserve their lead.
Image source, Getty ImagesManchester City 3-1 Barcelona
Phil McNulty
BBC Sport chief football writer at The Etihad
When Manchester City appointed Pep Guardiola, it was with nights like this in mind - the notion of seeing Europe's elite being overcome in the Champions League.
And what a night this has been, packed with wonderful football, goals and mistakes. A classic.
If City see this out, it will be seen as a real statement from Guardiola and his team.
Manchester City 3-1 Barcelona
I've just seen another replay of that third City goal which suggests that the ball may have struck Sergio Aguero's arm in the build-up. A touch of fortune perhaps for the hosts.
Arsenal might have to wait another three weeks to wrap up their place in the Champions League knockout stages. Luca Zuffi has just equalised for Basel against Paris St-Germain.
One of PSG or Arsenal need to win to send them both through (presuming neither lose).