Ex-Arsenal defender Martin Keown
BBC Radio 5 live at Emirates Stadium

"Besiktas are dominating possession now and Arsenal are trying to hit them on the counter-attack.

"We are into the real nuts and bolts of the match now - where it will be won and lost.

"For Arsenal it is a wake up call. They can't give them any opportunity.

"It is real test of their fitness. Beskitas have not started their season yet, but you can't question their fitness."

Listen to BBC Radio 5 live for live commentary on Arsenal v Besiktas.

Santi Cazorla drills the ball against the outside of the post but the whistle had already gone for a foul.

A Besiktas goal and Arsenal won't be in the Champions League for the first time in 17 seasons.

Nervous Arsenal fans? You can get from behind the curtains in about 20 minutes.

Phil McNulty
BBC Sport Chief Football Writer at Emirates Stadium

"Suddenly nerves are fraying again at Emirates Stadium as Besiktas press forward for the goal they need. Arsenal will hope to take advantage of the increasing risks the Turks will have to take - but this could yet seem like a very long last 20 minutes."

Besiktas are enjoying a good spell with less than 25 minutes left. The Turks haven't given up and are making the Emirates a pretty nervy place right now.

This could go either way.

BBC football pundit Robbie Savage:, external Jack Wilshere having a great game. Must have been my analysis on BBC Match of the Day on Saturday.

Image source, AFP

Conal from Derry: People get so carried away these days. Sanchez has scored one goal and suddenly he's the "signing of the summer".

James from Surrey: Regarding Ben's earlier comment - Why do players EVER appeal for throw ins? They only go and throw them straight back to the opposition 75% of the time anyway. Is there a gap in the market for a "throw in coach"?

Keith Lucas: I would not care if Arsenal didn't qualify. How many times have they come second in the group and then get knocked out in the first round of the knock-outs? Concentrate on the league and suffer less stupid midweek games and injuries.

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Besiktas almost level. The ball falls to Demba Ba inside the penalty area, after some hesitant Arsenal defender, but the Senegal striker lashes the ball into the side netting.

Image source, Reuters

Gokhan Tore is on for Olcay Sahan as Besiktas look to force the pace.

The midfielder has had a bit of time out after being injured in a shooting in a night club.

The net ripples but it is the wrong side as Mathieu Debuchy's downward header hits the side netting. Half an hour to play and Arsenal know a Besiktas goal sends them out on away goals.

Besiktas's third caution of the night as Pedro Franco is cautioned for a foul on Mesut Ozil. Free-kick from the left for the Gunners.....

Image source, Getty Images

Ex-Arsenal defender Martin Keown
BBC Radio 5 live at Emirates Stadium

On a couple of early chances for Arsenal in the second-half:

"Besiktas goalkeeper Tolga was like full-back there. He was way out of his box. In the end he gets in a good tackle and it's corner to Arsenal. Good running from Oxlade-Chamberlain though.

"[The second chance] was a bit scruffy down the right-hand side. The ball comes back to Wilshere, who threads it through for Sanchez, who pokes it wide."

Listen to BBC Radio 5 live for live commentary on Arsenal v Besiktas.

A roar of relief from the home fans as Oguzhan Ozyakup strikes well over the bar.

Arsenal are on the rampage.

This time, after another quick Gunners break, Alex Oxlade-Chamberlain cuts inside before seeing a goal-bound shot blocked.

Besiktas are living dangerously, although the visitors now have a free-kick in a dangerous position 25 yards from goal.....

How did that not go in?

Brilliant from Jack Wilshere as his disguised pass finds Alexis Sanchez unmarked inside the penalty area. The Chilean, with just goalkeeper Tolga Zengin to beat, stabs his shot wide.

He has to score.

Image source, AFP

Arsenal are pressing. Santi Cazorla collects the ball from Alex Oxlade-Chamberlain, drives towards the penalty area, before drilling wide of the far post.

The Gunners know though a Besiktas goal and the Turks are in the driving seat on away goals.

Apaka N Sakakibara:, external Has Sanchez just paid his fee off? This goal might prove to be worth the money Arsenal have paid for him. One more please.

Matt Smith:, external What game is the referee watching? Besiktas denied two blatant penalties. Arsenal lucky to still be competitive.

Batmanu Eboue:, external And that goal shows exactly why Alexis Sanchez is the signing of the summer.

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A second goal of the night for Jon Walters, this time profiting from good work from Victor Moses, tapping in a perfect low cross from the right.

The teams are back out and the match is under way.

A tight opening half at St Andrew's in the League Cup second round tie between Birmingham and Sunderland.

Image source, Getty Images

David Cotterill has hit the post for Blues after both Billy Jones and Wes Brown failed to clear the danger and Wes Thomas has also fired wide for the hosts.

Sunderland's Jozy Altidore volleyed over from Sebastian Larsson's dinked pass and Connor Wickham blasted off target from 25 yards.

Portuguese referee Pedro Proenca will be welcome at the Emirates again after that first half. To be fair, it would be hard argue against his two big calls but they could have gone against Arsenal.

Mathieu Debuchy and Jack Wilshere will both be relieved men after penalty shouts against them. Debuchy just about got the ball, while it is difficult to see if there was contact between Wilshere and Ramon Motta. A lot of officials would have given it but, if he didn't see contact, he was right to wave play on.