Extra, Extra! Yaya Sanogo finally scores as Arsenal win

Alexis Sanchez was terrific yet again for Arsenal

Arsenal sealed their place in the last-16 of the Champions League thanks to a 2-0 Group D home win against Borussia Dortmund.

French starlet Yaya Sanogo needed only 73 seconds of his first Gunners start since August to fire the hosts ahead at the Emirates Stadium, before Chile international Alexis Sanchez bagged his 13th goal in 20 appearances since his big-money summer move from Barcelona to seal the win in the second half.

In addition to a much-needed win and a rare clean sheet for Arsene Wenger's men, the three points keep alive their hopes of beating Dortmund to top spot in Group D going into the knockout rounds.

However they will have to win in Turkey against Galatasaray in their final match next month and hope Anderlecht do them a favour by winning against Dortmund in Germany.

Arsenal, who were looking to bounce back form Saturday evening's disappointing 2-1 home defeat against Manchester United in the Premier League, started brightly and made a dream start when going in front inside the second minute.

Sanogo knocked the ball to Santi Cazorla on the edge of the area and then beat the offside trap to collect the return pass down the right before firing a low effort past Roman Weidenfeller.

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He should have grabbed his and Arsenal's second in the ninth minute as he got in beyond the Dortmund defence and raced through on goal. However he failed to get a shot off and momentarily lost possession of the ball, before getting a second chance only to see the goal-bound strike well blocked by defender Matthias Ginter.

Dortmund managed to come back into the game and the stretching Ciro Immobile was not far away from diverting Lukasz Piszczek's lovely right-wing cross into the net at the back post in the 19th minute.

The German outfit had their best chance in the 39th minute when the Gunners' defence were caught sleeping as Henrikh Mkhitaryan latched onto a Piszczek's head down into the area and his low strike was well saved by the legs of Damian Martinez at his near post.

Dortmund had more purpose about them at the start of the second half but it was Arsenal who looked the more likely to add to the scoreline.

On 51 minutes a quick counter-attack saw Sanchez burst through the middle before lashing a low strike from outside the box which Weidenfeller dived across to his left to push past his post.

Alex Oxlade-Chamberlain went even closer three minutes later when his half-volley from just outside the box looped over the stranded Weidenfeller but rebounded off the crossbar and bounced away to safety for the visitors.

The killer second goal did arrive on 57 minutes when Sanchez collected a Cazorla pass to him down the left channel before he cut inside Piszczek and curled a right-foot effort into the far corner of the net.

Dortmund enjoyed some good possession as the game edged towards full time but they never really troubled the Arsenal defence.

Ilkay Gundogan forced Martinez into a low save in the 82nd minute when he fired an effort at goal from just outside the area after the Gunners cleared a right-wing corner into his path.

Martinez pulled off a decent close-range stop in the second minute of stoppage time to deny substitute Adrian Ramos a consolation and preserved a deserved clean-sheet for the Gunners.