Aaron Ramsey scored the only goal of the match as Arsenal beat Borussia Dortmund 1-0.

The Gunners were facing a tough task after losing to Dortmund at the Emirates.

It was goalless at the break.

Ramsey headed Arsenal ahead in the 62nd minute.

Mesut Ozil joined the Welshman to celebrate.

Arsene Wenger was all smiles at the full-time whistle.

Chelsea were taking on Schalke.

Demba Ba’s strike sealed a 3-0 win.

Jose Mourinho was happy to say well done to the striker.

Eto’o netted again to double Chelsea’s advantage.

Samuel Eto’o charged down a clearance to put the Blues ahead.

Celtic were hoping for a second victory over Ajax in this season’s competition.

No goals arrived before half-time.

Lasse Schone scored the only goal of the match for Ajax in the 51st minute.

That left Celtic boss Neil Lennon feeling frustrated.

Zenit St Petersburg drew 1-1 with Porto in the first match of the night.

Lionel Messi scored twice as Barcelona beat AC Milan 3-1.

Gonzalo Higuain was also at the double as Napoli claimed a 3-2 victory over Marseille.

Atletico Madrid were 4-0 winners over Austria Vienna.