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Roma 1-1 Barcelona
Dinamo Zagreb 2-1 ARSENAL
CHELSEA 4-0 Maccabi Tel Aviv
Bayer Leverkusen 4-1 BATE Borisov
Olympiakos 0-3 Bayern Munich
Dynamo Kiev 2-2 Porto
Gent 1-1 Lyon
Valencia 2-3 Zenit St Petersburg

Having previously lost their last 15 games in this competition, Dinamo Zagreb have shocked Europe and beaten a 10-man Arsenal 2-1. The Gunners were rotten to the core as they lost their first game in this competition for the second year running and now have it all to do if they have any notion on improving on four consecutive last 16 exits.

Elsewhere, Chelsea's domestic issues aren't forgotten about, but Jose Mourinho and his side had a far more comfortable evening at Stamford Bridge this evening, cruising to a 4-0 win over an admittedly poor Maccabi Tel Aviv side.

Alessandro Florenzi's sublime strike was enough to see Roma hold Barcelona to a draw at the Stadio Olimpico, while Bayern Munich awoke from their first half slumber to seal a routine win over Olympiakos.

Wednesday's results:

Roma 1-1 Barcelona
Dinamo Zagreb 2-1 Arsenal
Chelsea 4-0 Maccabi Tel Aviv
Bayer Leverkusen 4-1 BATE Borisov
Olympiakos 0-3 Bayern Munich
Dynamo Kiev 2-2 Porto
Gent 1-1 Lyon
Valencia 2-3 Zenit St Petersburg

FULL TIME: Dinamo Zagreb 2-1 Arsenal

The only thing Arsenal have managed in extra time is nearly get another man sent off. Joel Campbell this time is lucky to avoid a second yellow after a silly challenge.

Goal! Oympiakos 0-3 Bayern Munich (Thomas Muller)

Arsenal have five minutes of added time to find an equaliser.

Goal! Olympiakos 0-2 Bayern Munich (Mario Gotze, 89)

Goal! Dynamo Kiev 2-2 Porto (Buyalskiy, 89)

Chelsea have a fourth after a smooth counter attack saw Loic Remy fire on goal. His shot was palmed clear, but only as far as Fabregas who simply tapped home from yards out.

Goal! Dynamo Moscow 1-2 Porto (Aboubakar, 81)

Goal! Chelsea 4-0 Maccabi Tel Aviv (Cesc Fabregas, 79)

Arsenal pull one back! Theo Walcott springs clear down the inside left channel and coolly slots the ball past Eduardo in the Dinamo goal.

Moments ago, David Ospina was perhaps lucky to escape a red card after he charged out of goal in an effort to win the ball. On a first look, it looked as if he had successfully dispossessed the Dinamo forward. The stud marks on his leg suggest different.

Goal! Dinamo Zagreb 2-1 Arsenal (Theo Walcott, 77)

Goal! Bayer Leverkusen 4-1 BATE (Hakan Çalhanoğlu, 76)

Goal! Valencia 2-3 Zenit (Axel Witsel, 76)

Goal! Valencia 2-2 Zenit (André Gomes, 69)

Nick Howson at Stamford Bridge

As the evening goes on, the decision to rest several of his first team regulars is starting to pay dividends for Jose Mourinho as his side stroll towards a second win of the season, while weekend opponents Arsenal - albeit with a weakened side themselves - stumble to a loss in Zagreb.

"It has been far from perfect from Chelsea and teams better than Maccabi might have punished their hesitancy in attack, but they will take a great deal of confidence from a moral boosting win, not to mention from the trials of their London rivals.

Meanwhile in Zagreb, Theo Walcott has entered the fray along with Francis Coquelin and Joel Campbell. They have 25 minutes to save this contest.

Chelsea cruising now as Fabregas lifts a ball into the box to find Costa who in-turn lifts it into the top corner with a fine first-time effort.

Goal! Chelsea 3-0 Maccabi Tel Aviv (Diego Costa, 59)

Elsewhere tonight, Javier Hernandez has scored his first goal for the club for Bayer to extend their lead against BATE.

Goal! Bayer Levekusen 3-1 BATE (Javier Hernandez, 59)

Goal! Valencia 1-2 Zenit (João Cancelo, 55)

It;s two! Fernandes, denied moments ago, meets a corner with a thumping header past Ospina. Absolutely dreadful marking from Arsenal.

Goal! Dinamo Zagreb 2-0 Arsenal (Junior Fernandes)

Arsenal are having a 'mare here. Suddenly Dinamo spring forward and it's four on two. The ball eventually comes across to Fernandes on the left of the goal but Koscielny makes a vital deflection to force the corner.

Well, sort of. I'm pretty sure that was a cross that looped in from the Germany international. Looked nice, though.

Goal! Bayern Munich 1-0 Olympiakos (Thomas Muller, 53)

Goal! Bayer Leverkusen 2-0 BATE (Hakan Çalhanoğlu)

Arsenal should be two down! A corner lobbed into the Gunners box is nodded onto Hilal Soudani who is completely free inside the six yard area. He nods the ball on but is denied by the woodwork and can't react quickly enough to follow up with another effort.

Nick Howson at Stamford Bridge

The loss of Willian to what looked like a leg muscle injury has noticeably tempered Chelsea's fluency and as a result Maccabi have been able to get a foothold in a game they have been a peripheral part of for long periods. Jose Mourinho's side are not without effort but they are devoid of a cutting edge and look rusty in the final third. The performance of a team struggling for form, you could say. Of course, you can't argue with a two-goal lead.

It's half time in our eight Champions League games this evening and the biggest shock is taking place in Croatia where Dinamo Zagreb have a 1-0 lead over a 10-man Arsenal. Olivier Giroud was shown a second yellow card after just 40 minutes to round off a miserable first half for the Gunners.

Eden Hazard's missed penalty is probably still gaining altitude but thankfully for him, Willian's free kick bypassed everyone shortly after to give Chelsea a lead over Maccabi Tel Aviv. On the stroke of half time Jose Mourinho's side won another penalty with Oscar taking responsibility for this one. He made no mistake, giving his side a 2-0 lead.

A wonderful 50-yard effort from Alessandro Florenzi has levelled things up for Roma against Barcelona at the Stadio Olimpico after Luis Suarez's opener. Florenzi inexplicably launched his effort from the touchline, lobbing ter Stegen and perhaps stealing the headlines tonight.

Half time scores:

Roma 1-1 Barcelona
Dinamo Zagreb 1-0 Arsenal
Chelsea 2-0 Maccabi Tel Aviv
Bayer Leverkusen 1-1 BATE Borisov
Olympiakos 0-0 Bayern Munich
Dynamo Kiev 1-1 Porto
Gent 0-0 Lyon
Valencia 0-2 Zenit St Petersburg

Half time whistles are being blown across Europe now as half time draws in.

Goal! Chelsea 2-0 Maccabi Tel Aviv (Oscar, 45)

Goal! Valencia 0-2 Porto (Hulk, 45)

What a mess this is turning into. Five minutes from half time, Giroud is shown a second yellow card and he is gone. Having been booked for dissent earlier, the Frenchman this time was beaten to a loose ball after a Dinamo free kick was charged down, leaving a leg hanging out to trip his man.

RED CARD - Olivier Giroud (Arsenal)

Oh wow, Florenzi! Roma are level against Barcelona thanks to a stunning lob from Alessandro Florenzi. From just inside the Barca half out on the right he catches Ter Stegen out with a wonderful effort. Messi is gonna have to do something special to top that tonight.

Goal! Roma 1-1 Barcelona (Florenzi, 31)

That Zagreb goal has actually gone down as an Alex Oxlade-Chamberlain own goal. He's been one of Arsenal's brightest players so far, but he really forgot about his defensive duties in that incident.

Arsenal are behind! Pavaric races in down the inside left channel with Oxlade-Chamberlain perhaps playing him on side. He picks up the neat through ball but sees his shot blocked by Ospina. Luckily for him, it comes straight back Chamberlain and back into his path , allowing him to knock it into the back of the net.

Goal! Dinamo Zagreb 1-0 Arsenal (Josip Pavaric, 24)

Goal! Dynamo Moscow 1-1 Porto (Aboubakar, 23)

It's Lionel Messi's big night at the Stadio Olimpico but Luis Suarez has opened the scoring for Barcelona, coming in at the far post to nod home Ivan Rakitic's cross.

Goal! Roma 0-1 Barcelona (Luis Suarez, 21)

Nick Howson at Stamford Bridge

Pulsating start to proceedings at Stamford Bridge. Chelsea have started with an insatiable intensity, which has been devoid from their season to date, and they have the Israelis pinned inside their own half and now have their lead albeit in fortunate circumstances.

"Nevertheless, that has not stopped Jose Mourinho from launching scathing attacks towards referee Felix Swayer from Germany, who decided against sending off goalkeeper Predrag Rajkovic after he took down Willian. The less said about Eden Hazard's penalty the better.

Goal! Dynamo Kiec 1-0 Porto (Gusev, 20)

Arsenal come close again! Oxlade-Chamberlain bursts down the right and whips a delightful ball across to the near post. Giroud connects, but sees his effort come back off the post and the goalkeeper gets to the rebound before him to clear.

Chelsea probably won't be made to rue that missed penalty, they've just moved ahead after 15 minutes. Willian loops a cross in from the left that bypasses everyone and somehow finds it way into the far corner. Not pretty, but it will do.

Goal! Chelsea 1-1 Maccabi Tel Aviv (Willian, 15)

Goal! Bayer Leverkusen 1-1 BATE (Milunović, 13)

Here's that penalty miss from Hazard. It, erm, wasn't the best.

Goal! Valencia 0-1 Zenit St Petersburg (Hulk, 9)

Arsenal so close to taking the lead! Cazorla whips a sublime corner into the box that Giroud thumps towards goal but the Dinamo goalkeeper gets a firm hand to bat it away.

Oh, Eden. What happened there?! Willian's darting run into the box resulted in the Brazilian being felled by the goalkeeper, he was booked for his trouble. Hazard strolled up to take the spot kick, but horribly skies it!

Penalty missed - Chelsea (Eden Hazard)

Penalty for Chelsea

Debuchy exchanges passes with Oxlade-Chamberlain from a throw in and digs out an excellent cross that Alexis charges to get on the end of in the six yard area, but the Chilean is penalised for barging into his opponent. Good start from the Gunners.

Goal! Bayer Leverkusen 1-0 BATE (Admir Mehmedi, 3)

Chelsea's Ruben Loftus-Cheek has the first booking of the evening after a high boot.

And we are five minutes from kick off this evening. Remember, we will be bringing you the goals as they go in across Europe throughout the evening.

Nick Howson at Stamford Bridge

Eight years ago, almost to the day, Jose Mourinho managed the final game of his first spell with Chelsea in a 1-1 draw with Rosenborg. After a similarly horrid start to the campaign, conclusions are being drawn between that game in 2007 and tonight's opponents Maccabi Tel Aviv. With all the talk of Mourinho's third season syndrome will tonight's game prove to be as significant?

Arsenal's opponents tonight are without a win in their last 15 Champions League group games.

Arsene Wenger speaking to BT Sport:

"There are two competitions really - the group where you want to get out in a strong position and then a cup competition. Now, let's get good results.Overall, an international is rested and another international comes in so for me it is not a big change. We will approach it correctly but, even if we do so, it will be a difficult game. It has all the ingredients to be tricky.

While we count down to kick off, the folks at bwin have looked back at the history of this competition in its old format and its current inception to decide what effects the modernisation of the game has Europe's greatest club competition. They've knocked up two teams from each version. Who is your money on?

European Cup v Champions League

Away from the Premier League contingent; Lionel Messi is playing in his 100th Champions League game this evening. In those, he's racked up a modest 100 goals and 22 assists. Oh, and he's won the thing four times.

Arsene Wenger's side take on Chelsea and Tottenham in the next six days after this evening's clash in Croatia so he has predictably brought in a few changes. David Ospina, Kieran Gibbs, Mikel Arteta and Olivier Giroud come in this evening with Cech, Monreal, Coquelin and Walcott dropping to the bench. Can we take that as a sign the latter will be given the nod against Chelsea on Saturday, then?

Amongst the Dinamo Zagreb subs this evening is Angelo Henriquez, formerly of Manchester United.

Nick Howson at Stamford Bridge

The phrase 'it never rains but it pours' could not be a more poignant way to describe the build up to Chelsea's Champions League opener, amid some significant weather both on and off the pitch. Jose Mourinho's have made their worth league start for three decades and have made the worst start to a title defence in Premier League history.

"Tonight they welcome Israeli champions Maccabi Tel Aviv, relative minnows in the context of the Champions League, but nevertheless a potential banana skin which Chelsea would do well to avoid. Remember Rosenborg eight years ago? Tel Aviv will be keen to put the final nail in Mourinho's coffin. Oh, and if you're looking for all of the rain due in September, west London is the place. Stamford Bridge has even sprung a leak.

Jose Mourinho talked about making changes for this evening's game on Monday and he has kept to his word. John Terry, Nemanja Matic and Diego Costa have all been dropped, although Cesc Fabregas retains his spot despite the criticism thrown his way.

BREAKING: David Ospina repalces Petr Cech in goal while Olivier Giroud is preferred up front over Theo Walcott.

Arsenal team to face Dinamo Zagreb: Ospina; Debuchy, Gabriel, Koscielny, Gibbs; Arteta, Cazorla; Oxlade, Özil, Alexis; Giroud

Subs: Monreal, Chambers, Flamini, Coquelin, Walcott, Campbell

BREAKING: Baba Rahman makes his Blues debut this evening while Ruben Loftus-Cheek starts in midfield. Loic Remy replaces Diego Costa up front.

Chelsea team to face Maccabi Tel Aviv: Begovic; Azpilicueta, Zouma, Cahill (c), Baba Rahman; Loftus-Cheek, Fabregas; Willian, Oscar, Hazard; Remy

Subs: Blackman, Terry, Ivanovic, Ramires, Matic, Traore, Diego Costa

Some team news in ahead of perhaps tonight's biggest game; the battle between Roma and Barcelona and the Stadio Olimpico

Roma XI to face Barcelona: Szczęsny; Florenzi, Rüdiger, Manolas, Digne; Nainggolan, De Rossi, Keita; Falqué, Džeko, Salah

Barcelona XI to face Roma: Ter Stegen; Sergi Roberto, Piqué, Mathieu, Alba; Rakitić, Busquets, Iniesta; Suárez, Messi, Neymar.

Chelsea team news: Radamel Falcao is absent from tonight's game after Jose Mourinho revealed the striker has a minor problem during his press conference on Tuesday. The Blues boss indicated there could be roles tonight for Oscar, who hasn't featured since the opening day of the season, and summer signing Baba Rahman who is awaiting his debut.

Arsenal team news: The Gunners are still reeling from the news that Jack Wilshere will miss the next three months of action. The midfielder will undergo his sixth surgery in the space of four years, also his third inside a year, later this week. He joins Danny Welbeck, who is also sidelined with a long-term problem.

The Gunners could also be without Per Mertesacker after his involvement in a minor road traffic incident on Monday. Early suggestions are that Petr Cech could be given the night off tonight with David Opsina coming into replace him.

Can Chelsea and Arsenal succeed where Manchester United and Manchester City failed miserably? The clubs from the northwest both lost their opening group games of this Champions League campaign on Tuesday night. City's defeat at the hands of last season's runners up Juventus provided an early indication that Manuel Pellegrini's side may still be just short of the required standard needed to compete for this competition, while United's dismal loss to PSV Eindhoven was a humiliating welcome back that was also marred by Luke Shaw's sickening leg break.

For Chelsea, this competition could provide a welcome break from their dismal start to their Premier League defence, where they have lost three of their opening five games. Arsenal meanwhile enter tonight's game in relatively solid form, eager to prove they have the depth to progress beyond the last 16 of this competition.

There are eight games across Europe this evening, we will keep you informed in what's going on in each of them.

Roma v Barcelona

Dinamo Zagreb v Arsenal

Chelsea v Maccabi Tel Aviv

Bayer Leverkusen v BATE Borisov

Olympiakos v Bayern Munich

Dynamo Kiev v Porto

Gent v Lyon

Valencia v Zenit St Petersburg