FT: Celtic 0-4 Bayer Leverkusen - Hincapié and Wirtz net in first half; Alario converts from spot with Adli scoring in final seconds
Ange Postecoglou's side play first home group match
FT: Sparta Prague 1-0 Rangers: Hancko's header thuds in off post despite McGregor's attempted save
Kamara ordered off in second half for second booking with 16 minutes to play after being booed by crowd
HT: Celtic 0-2 Bayer Leverkusen
Image source, SNSIt's been downhill for Celticsince David Turnbull's slip led to the first goal
Image source, SNSFlorian Wirtz scored the second for Leverkusen
HT: Ferencvaros 1-1 Real Betis
Meanwhile, in the other game in Celtic's group, it is all square in Hungary.
Nabil Fekir put Real Betis ahead after 17 minutes, but the hosts equalised through Myrto Uzuni just before half time.
HT: Celtic 0-2 Bayer Leverkusen
Pat Bonner
Former Celtic goalkeeper on BBC Sportsound
Quote MessageLeverkusen weathered Celtic's storm early on and really grew into the game. Goals change games and they controlled it from their opener. It's not always about the guy on the ball, it's the movement around him.
FT: Sparta Prague 1-0 Rangers
Rangers manager Steven Gerrard tells Rangers TV: "I'm disappointed with the scoreline, obviously. I'm disappointed with the start we've got off to in the group, losing two games is not ideal.
"I think the next game is a must win now. We have to win the next game at home to Brondby to give ourselves an outside chance.
"In terms of the performance I thought maybe Sparta just edged it in terms of chances, but I was really pleased with the boys, especially when we got to 10 men. We threw caution to the wind and we tried our best to rescue a point.
"Our keeper has been busier than theirs and we have to admit that, but when we went to 10 men we took risks, and we played with more endeavour and desire and we looked like we could create more and still looked like we could rescue a point."
Image source, SNSRangers manager Steven Gerrard
It's going to take some comeback by Celtic to get anything out of this game now.
Piero Hincapie took advantage of a David Turnbull slip to open the scoring for Leverkusen and Florian Wirtz's fifth goal in five games has doused Celtic's early fire.
Image source, SNSPiero Hincapie opened the scoring for Leverkusen
Image source, SNSDavid Turnbull's slip led to the opening goal
Celtic 0-2 Bayer Leverkusen
Pat Bonner
Former Celtic goalkeeper on BBC Sportsound
Quote MessageWe expected Celtic to make a few more chances, but they haven't been able to control the game since they conceded. Celtic haven't found any of those little spaces they found earlier on
Celtic 0-2 Bayer Leverkusen
Image source, SNSCeltic defender Adam Montgomery was unable to prevent Piero Hincapie's flick opening the scoring
Celtic 0-2 Bayer Leverkusen
Pat Bonner
Former Celtic goalkeeper on BBC Sportsound
Quote MessageHe was unmarked, but it's still great vision to pick him out. You can see they have a brilliant ability to pick players out in and around the box
Florian Wirtz
Celtic pay for another mistake in their own half, this time Anthony Ralston being at fault.
Germany midfielder Florian Wirtz has been in fine scoring form recently and finds the top corner off the body of goalkeeper Joe Hart.
Celtic 0-1 Bayer Leverkusen
Pat Bonner
Former Celtic goalkeeper on BBC Sportsound
Quote MessageThis game is being played at a Champions League tempo. The speed, the movement, the passing is all at such a high quality
Celtic 0-1 Bayer Leverkusen
Incidentally, this is goalscorer Piero Hincapie's first start for Leverkusen.
The 19-year-old Ecuador centre-half was signed this summer from Talleres de Cordoba in Argentina's top flight.
Celtic 0-1 Bayer Leverkusen
That goal has certainly dampened the atmosphere at Celtic Park.
It was electric, but the noise has dipped along with the home side's performance since they fell behind.
Celtic 0-1 Bayer Leverkusen
James McFadden
Former Scotland forward on BBC Sportsound
Quote MessageI think Turnbull's tried to take it away and fake it and he slipped. These sides of this quality punish you when you make mistakes like that
Piero Hincapie
Disaster for David Turnbull - and even worse for Celtic.
The Scotland midfielder slips as he tries to be too clever on the edge of his own penalty box and Piero Hincapie is set up by fellow defender Mitchel Bakker for a simple tap-in.
Celtic 0-0 Bayer Leverkusen
A superb ball from Florian Wirtz over the Celtic defence finds Moussa Diaby in the clear, but Celtic goalkeeper Joe Hart is out quick to block.
Celtic 0-0 Bayer Leverkusen
James McFadden
Former Scotland forward on BBC Sportsound
Quote MessageKyogo's movement was absolutely sensational. He's in a good area and he should score. The goalie did well too. But wow, what movement it is from Kyogo
Celtic 0-0 Bayer Leverkusen
From the corner, centre-half Carl Starfelt's shot on the turn looks to be creeping inside the post, but goalkeeper Lukas Hradecky is again to the visitors' rescue to turn it wide.
Celtic 0-0 Bayer Leverkusen
Celtic should be ahead.
Kyogo Furuhashi is put through on goal by Liel Abada, but goalkeeper Lukas Hradecky deflects it wide.
Celtic 0-0 Bayer Leverkusen
It's Leverkusen's turn to threaten again. This is like table tennis.
Celtic goalkeeper Joe Hart turns a powerful Florian Wurtz drive over the crossbar, but the flag was up for offside in any case.
Celtic 0-0 Bayer Leverkusen
Celtic continue to press and a shot on the turn by Tom Rogic flies a few feet over the crossbar.