And that's it! Arsenal win 2-0 thanks to two goals from Jack Wilshere.
We will have two minutes of added time.
CHANCE! Walcott popped up in that central position I mentioned earlier but he drags his shot wide from the edge of the area.
CHANCE! Walcott has looked threatening. He's drifting inside more now in order to receive the ball. Then from his usual wide position he whips in a ball and when it breaks to Cazorla he fires over the bar.
Arsenal have certainly taken their foot off the pedal. Cazorla reminds the crowd of his talent as he skips past 2 or 3 Marseille players just outside then Arsenal box.
Abdallah with another testing cross from the right but Mertesacker clears.
Cheyrou has also come on for Lemina
Ozil off Arteta on.
Romao for a late challenge.
Morel having a real go down the left. Gignac then tries to spin past Koscielny but he won't win a foul for that.
Thauvin's movement causing Arsenal one or two problems. Luckily he was introduced late on.
CHANCE! Abdallah with a ball to Thauvin and Szczesny makes a really impressive save.
Wilshere and Rosicky off, Walcott and Cazorla on.
Thauvin then has one cleared off the line from Monreal.
Rosicky gives the ball away, it looks like Gignac is through but Szczesny is alert.
Thauvin with a header after a cross from the left but he isn't big enough to direct it towards goal.
Gignac, probably one of Marseille's more impressive players on the night, looks for a teammate in the box but Arsenal clear.
No more than Arsenal deserve. Time for Walcott?
GOAL! Wilshere taps home his second after an excellent move involving Ramsey and Ozil. 2-0.
Giroud nearly has an opening at the other end after good head control but Marseille survive.
Marseille certainly look more threatening after the introduction of Valbuena and Thauvin.
Abdallah sends Thauvin away down the right and there appears to be more urgency about Marseille's play.
Rosicky then has a half chance but his shot is blocked.
Rosicky and Monreal try to create space down the left but it's easy for Marseille.
Valbuena and Thauvin on. Ayew and Imbula off.
CHANCE! Ozil through in the inside right position after a brilliant ball from Wilshere but Mandanda does really well to block.
Koscielny steps in to win the ball back for Arsenal. Moments later Giroud has a try but it deflects off Abdallah and goes wide.
Arsenal just struggling to find that killer pass in the Marseille final third at the moment. Monreal the latest.
Giroud with a lovely stabbed ball into the path of Ozil down the right and then Sagna gets it all wrong and slices it out of play.
OFFSIDE! Giroud clean through after another lovely scooped pass from Ramsey but the flag was up nice and early.
Ramsey goes down and it's a free-kick for Arsenal.
Walcott warming up on the touchline. Arsenal may want another goal before introducing him.
Mertesacker getting involved from deep as well and it's all very pretty from the home side.
Flamini with plenty of early touches this half. Patience the name of the game.
Marseille start the second half.
The referee blows for the break and Arsenal lead 1-0 at the break thanks to Jack Wilshere.
We will have one minute of time added on at the end of the half.
Good work by Khelifa that time. He tracked Sagna well. It looked for a moment like the defender may have been able to get a shot away at goal.
A bit more precision and composure in the final third and Arsenal could/should be out of sight.
Ramsey hits the free-kick but it's straight at the wall and Marseille clear. The wall did well.
Arsenal free-kick right on the edge of the box. Can they grab a deserved second?
For Morel on Ozil.
MISSED PENALTY! Ozil side foots the ball towards the corner but Mandanda palms away. Excellent work by Ramsey in the build up.
PENALTY! Lovely skill by Ramsey who flicks it past the defender.
Koscielny attempts a long pass to Wilshere but that goes straight out of play.
Lemina strides forward with the ball but Sagna is equal to it and then neat play by Ramsey to maintain possession.
OFFSIDE! Ramsey with a ball round the corner to Giroud but the flag was up.
OFFSIDE! Giroud can't get on the end of Ozil's free-kick. It did look like Lucas Mendes was pulling his shirt.
Wilshere wins the ball deep inside the Marseille half and Arsenal look to get moving again with Sagna and then Rosicky. Sagna is then fouled by Khelifa.
Gignac tries to thread one through and then Arsenal give the ball away. A little sloppy.
Arsenal having a rest now with Abdallah, Morel and Romao seeing some of the ball.
Rosicky hits one wide after patient approach play.
Arsenal still in control but the home fans won't be completely happy until they have a second goal.
Good pressure from Giroud on Lucas Mendes and Arsenal reclaim possession.
The referee is now receiving some treatment on his back. He looks to be OK.
CHANCE! Gignac receives the ball in the area but Szczesny is out quickly to smother. Warning for Arsenal.
Arsenal still have the ball. They appear happy to go backwards as much as forwards. Sagna then breaks down the right but he can't quite pick out Wilshere.
Ozil, Monreal, Flamini and Ramsey all seeing plenty of the ball in and around halfway.
CHANCE! Lovely scoop over the top from Ramsey to Ozil but for once his touch lets him down.
Gignac has a header from 15-yards and but it goes over. Wasn't a bad effort. Khelifa looks lively.
Marseille enjoying a reasonable amount of possession. Still some way from the Arsenal area though.
Loud cheers for Mandanda the Marseille 'keeper when the ball is rolled back to him.
Flamini will see plenty of the ball tonight occupying that position just in front of the Arsenal defence.
Gignac attempts a run forward but Flamini is there to intercept.
Arsenal allowed so much time on the ball. Giroud holds the ball up and wins his side a throw.
Sagna crosses but Lucas Mendes concedes the corner.
Arsenal knocking the ball around at walking pace at times. Mertesacker and Koscielny getting involved when they can.
Ozil and Wilshere interchanging. Ozil has a go down the right but Marseille win the ball back.
CHANCE! Excellent play from Arsenal again. Wilshere squares to Ramsey and Mandanda keeps it out. Should have been Arsenal's second.
Could be a long night for Gignac if he's chasing the ball all night up front for Marseille. Ramsey then has a go but it's wide.
Monreal forces a corner down the left and Arsenal look to build again.
That doesn't last long as N'Koulou gives the ball away. The away supporters are far quieter than they were 5 minutes ago.
Giroud fouls Lucas Mendes and the away side get the opportunity to string a few passes together.
Monreal seeing plenty of the ball and being allowed to drift infield.
Arsenal pinging the ball around with confidence. Top of the Premier League and 1-0 up already, you'd expect nothing else.
Well, well, well! I was half expecting a nervous evening. Superb start!
GOAL! Wonderful strike by Wilshere. He received a pass from Sagna, worked his way into the box and guided the ball into the top corner with his left foot. Perfect start for Arsenal.
Arsenal get us started. And away we go...
Steve Roffe has been in touch via Twitter: "A comfortable Arsenal win predicting 4-0."
Here come the players and kick-off is just moments away.
The players are in the tunnel area and are about to make their way out onto the pitch.
Chris Green has been in touch: "I am looking forward to this game as Arsenal play an entertaining brand of football when they deliver the goods. Of course, no game in the Champions League is simple as shocks can happen when you least expect it, but I see the Gunners sealing qualification to the knockout stages quite comfortably if they perform to their full potential."
Spaniard Antonio Lahoz will referee the game tonight.
The Arsenal fans will be really up for this one. Can they do it? You can get involved throughout. Send a Tweet to @FootballMcD and I will get as many comments on as possible.
If you fancy a flutter this evening why not head over to Sky Bet for the latest odds before and during this Champions League cracker: http://www.skybet.com/football/champions-league/event/15865316