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Live updates
22:33 BST - That's going to be it for us tonight but we shall be back tomorrow for more Champions League entertainment, including Aston Villa against Bayern Munich, Liverpool versus Bologna and Lille hosting Real Madrid.
Goodnight!
22:25 BST - Inter Milan built on their impressive draw against Manchester City on matchday one of the UEFA Champions League league phase by demolishing Crvena zvezda 4-0 at the San Siro.
22:24 BST - Barcelona made a swift return to winning ways, marking their first-ever competitive H2H against Young Boys with a dominant 5-0 victory in the UEFA Champions League - ensuring that the Swiss side’s wait for a first away victory in the top tier of European football since 1960 goes on.
22:23 BST - Bayer Leverkusen ended a five-match winless home run against Italian opposition by seeing off AC Milan at the BayArena, making it back-to-back victories to open their UEFA Champions League campaign in the process.
22:14 BST - Karim Adeyemi put in a sensational performance to bag himself a first-half hat-trick en route to Dortmund's 7-1 drubbing of Celtic:
22:05 BST - Erling Haaland's goal for Manchester City this evening was his 42nd Champions League goal in 41 appearances in the competition.
Monster!
22:00 BST - Here's a run down of all the results tonight in the Champions League, where it's also been a rather good night for Barcelona, Bayer Leverkusen and Inter.
Slovan Bratislava 0-4 Manchester City
21:52 BST - FULL-TIME! Arsenal run out 2-0 winners to inflict a first loss of the season on PSG.
21:51 BST - FULL-TIME! Celtic are finally put out of their misery as they slump to a 7-1 humbling away at Borussia Dortmund.
21:49 BST - FULL-TIME! Manchester City enjoy a simple day at the office with a 3-0 win over Slovan Bratislava.
21:41 BST - Number seven for Borussia Dortmund as Felix Nmecha rifles a low shot into the bottom corner.
The Celtic defence are having what's known in scientific academia as "an absolute stinker".
21:38 BST - A much more subdued second half at the Emirates as we enter the final 10 minutes.
Arsenal haven't been overly troubled but PSG have hit the bar and had a few moments to worry the Gunners' defence.
21:32 BST - GOAL! Substitute James McAtee - who replaced Erling Haaland on the hour mark - gets on to the end of a Phil Foden pass to grab City's fourth of the evening, plus a first senior goal for the academy product!
21:25 BST - GOAL! A dancing Serhou Guirassy gets his second of the match to make it six for Dortmund against Celtic on a miserable night for the Scottish champions.
21:14 BST - GOAL! Erling Haaland gets on the scoresheet for Manchester City and their work is all but done in Bratislava.
The Norwegian forward tucks away a one-on-one to make it 3-0 to the visitors.
21:03 BST - We're back underway.
Remember you can get stats throughout all the games live right here.
21:00 BST - It's been an absolute mauling for the Bhoys in Dortmund so far this evening. Can they restore a bit of pride before the night's out?
20:47 BST - It's half-time across the 20:00 kick-offs.
Good stuff for the English sides so far. Less so the Scots.
Slovan Bratislava 0-2 Manchester City
20:43 BST - GOAL! It's another one for Dortmund as Karim Adeyemi gets his third of the match. It's 5-1 and still a few minutes until half-time.
20:42 BST - GOAL! Celtic concede yet another penalty which this time is suitably dispatched by Serhou Guirassy. It's 4-1 to the yellow and black.
20:36 BST - GOAL! Arsenal go two goals up against PSG thanks to a set piece that eludes pretty much everyone, which means Bukayo Saka gets his name on the scoresheet. It's 2-0.
20:32 BST - GOAL! Karim Adeyemi is at it again as he rifles another one from the edge of the box past Kasper Schmeichel to make it 3-1 to Dortmund against Celtic.
20:21 BST - GOAL! Arsenal strike first and it's Kai Havertz who gets his head to Leandro Trossard's lovely cross to make it 1-0 to the Gunners.
20:15 BST - GOAL! Manchester City double their lead thanks to a neat finish from Phil Foden.
20:12 BST - GOAL! Celtic respond through Daizen Maeda, but moments later Karim Adeyemi smashes one from distance to make it 2-1 in just the first 12 minutes. Yikes.
20:10 BST - GOAL! Manchester City take an early lead through Ilkay Gundogan, who sees his shot deflect into the net.
Celtic are also behind in Dortmund after Kasper Schmeichel saves a penalty only to see Emre Can knock in the rebound.
20:00 BST - We're underway in each of tonight's remaining Champions League matches.
19:08 BST - Celtic will be hoping to build on the momentum of a big opening win in the Champions League this season, but they face a stiff challenge in last year's finalists Borussia Dortmund at Signal Iduna Park tonight.
Follow live audio commentary from 20:00 BST.
19:06 BST - Manchester City boss Pep Guardiola has stayed true to his word and put out a strong side to face minnows Slovan Bratislava this evening.
Follow live audio commentary from 20:00 BST.
19:04 BST - Arsenal welcome PSG to the Emirates this evening and it's as you were in terms of their first IX, with Mikel Arteta fielding the same starting line-up as they did against Leicester this past weekend.
Follow live audio commentary from 20:00 BST.
18:46 BST - Here's another quick reminder of all the juicy Champions League fixtures coming up this evening:
18:36 BST - Two games are already underway and have reached half-time in the Champions League, with Stuttgart and Sparta Prague all square and Brest holding a slender lead away at Salzburg.
Follow all the Champions League scores right here.
18:28 BST - PSG's Spanish manager, Luis Enrique, has a habit of beating his compatriot chums in competitive European matches, winning all of his encounters so far against the likes of Pep Guardiola and Unai Emery.
Will he be adding Mikel Arteta to that list of victims tonight?
18:25 BST - Unai Emery is hoping Aston Villa can summon the spirit of the club's 1982 European Cup final win over Bayern Munich when the German giants visit Birmingham in the Champions League on Wednesday.
"It is a special, special match for everyone," said Emery at his pre-match press conference on Tuesday.
"We are motivated and so excited to play tomorrow with our supporters in Villa Park. Remembering as well the final that Villa played against them 42 years ago."
16:13 BST - Xabi Alonso said yesterday that Bayer Leverkusen are expecting a typically dangerous game against Italian opposition when they host AC Milan tonight.
Milan made a poor start to the season, failing to earn a win in their opening three games, and while they also lost their Champions League game to Liverpool they have turned things around on the domestic front with three successive victories.
"An Italian team is always dangerous," Alonso said. "They know how to have patience. They are ready to defend low or to play with possession.
"Milan don't have to be dominant to be dangerous. Sometimes they have good possession, sometimes they have good counter-attacks."
15:04 BST - Here's how Arsenal have fared against PSG in recent meetings...
14:29 BST - Celtic are also in action this evening, facing the Bundesliga's Dortmund. Here's how Celtic got on against Slovan Bratislava last time out:
13:41 BST - Arsenal have a huge task on their hands tonight as they take on PSG. Click here to read all about how the Gunners' set-piece guru will be looking to dismantle the French giants.
12:17 BST - Pep Guardiola said yesterday he would not take Slovan Bratislava lightly in tonight's clash as his squad continues to adjust to life without key midfielder Rodri.
"When you have won four Premier League titles in a row in one of the toughest leagues in the world and a Champions League winner two years ago, we accept we are favourites when we play," Guardiola told reporters.
"They did not give me 2-0 before the game - it starts 0-0, same pitch. We have to prove it.
"We will put out the best team possible to compete and beat them.
"I have huge respect for them, and the patterns they make, but we will try to impose our game."
11:53 BST - Here is the full list of fixtures for today:
10:37 BST - Good morning and welcome along for a big day of Champions League action with teams such as Manchester City, Arsenal, Barcelona, PSG and Bayer Leverkusen all in action. We'll bring you all the big news and updates as the action unfolds across Europe.
