Celtic are doubling up on both Bayern wingers but it's not doing much to halt the waves of attacks from the men in red.

Alasdair Lamont
BBC Sport Scotland at the Allianz Arena

Just past the midway point of the first half and Celtic could be three goals down. If they were in any doubt about the size of the task facing them here, they know now. Bayern Munich have been really classy all over the pitch.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

I talked about it before the game. Lewandowski getting in between people. He was in between Cristian Gamboa and Lustig that time and he just, so clever, just waiting for the moment for his little run forward. Not offside this time. A wonderful save from Craig Gordon but again nobody reacting to the second ball and it ended up a goal for Bayern Munich. It’s the movement from Lewandowski and Muller up front when the other players have got the ball and that’s what Celtic have really got to defend against. They’re not up against this on a weekly basis and that’s the problem. And you can see it’s a real danger. They will have to defend better, with better concentration, better positioning and they will have to sort it out very, very quickly.

Image source, Getty Images

Kingsley Coman is a real box of tricks and the French winger pops up through the middle this time to have a lash from distance. One bounce and it flies straight into the arms of Craig Gordon.

No let-up from the hosts, who continue to press with impressive intensity. A corner breaks the way of Robert Lewandowski and the big striker fizzes a first-time effort narrowly wide.

Kingsley Coman leaves Cristian Gamboa for dead to set up a great shooting chance for David Alaba but the Austria full-back can only blaze over the crossbar from 10 yards or so.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

To be honest, it was really really bad defensive play from Celtic. Lustig was caught over in the right hand side, there was a huge gap. I think Boyata was pulled out of position. Lewandowski was all on his own. The pass, people can spot that pass, they play them through and I thought it was a penalty. I thought he pulled him back and it should have been a penalty.

Stuart Armstrong leads a Celtic break with a smart, raking pass into the path of Leigh Griffiths but the striker gets it stuck under his feet and Scott Sinclair can't control the loose ball on the edge of the penalty area.

Celtic get a few touches to stem the flow of home attacks but it's a brief respite as Bayern soon have the monopoly on the ball again.

Robert Lewandowski is on the charge again and he goes down as Mikael Lustig has a tug at his shirt. Celtic living a charmed life at the moment...

Thiago blasts the ball high into the net from a Robert Lewandowski cut-back. Not sure why it doesn't count... There's a suggestion that the ball ran out of play before the sliding Polish striker crossed but TV replays suggest Celtic got away with one there.

Elswhere in Group B, Kylian Mbappe fires PSG into an early lead against Anderlecht.

Uh-oh. Scott Brown, just back from injury, is down in a heap after catching a late tackle from Thomas Muller.

The Celtic skipper takes a few deep breaths and gets back to his feet.

Corner to Celtic. Nothing doing as a deep delivery to the back post from Leigh Griffiths is nodded clear by a defender in red.

A menacing start from the hosts as Kingsley Coman links with David Alaba before driving into the penalty area but Scott Brown is across to block.

A peep of the whistle from Russian referee Sergei Karasev and we're off...

Tom English
Chief sports writer, BBC Scotland

Handshake time. We're almost there. The stadium is rocking...

Arjen Robben reaches the landmark of 100 Champions League appearances this evening.

The 33-year-old scored a late winner when Bayern won the trophy back in 2013.

Having won league titles in his native Netherlands, England and Spain, he has picked up six Bundesliga winners' medals during his time in Munich.

Robben called time on his international career last week, scoring twice in his farewell appearance as the Dutch fell short in World Cup qualifying, making it 37 goals in 96 appearances.

He might be getting on a bit but the classic 'inverted winger' still has pace to burn and a bewildering ability to change direction on the run. Everyone knows he loves to cut in from the right and shoot with his left but stopping him is quite another thing.

Image source, Getty Images