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Thomas Vermaelen and Laurent Koscielny in action against Newcastle.
GK Wojciech Szczesny (7/10)
Usually, when a goalkeeper concedes three goals, he is at least partly at fault. However, I felt that Wojciech Szczesny continued his recent good form with a mostly solid display, and there wasn't much he could do about any of Newcastle's goals.
In the first half in particular, he made some impressive saves to keep the score at 1-1, denying the likes of Tiote from range and showing some good reflexes.
DR Bacary Sagna (6/10)
Bacary Sagna, who is usually remarkably consistent, didn't have his best game in an Arsenal shirt. He will be particularly disappointed at the ease with which Gabriel Obertan skipped past him for Newcastle's second goal. That said, he linked well with Alex Oxlade-Chamberlain and always offered an outlet on the right side.
CB Laurent Koscielny (5/10)
Every time Per Mertesacker is missing from the Arsenal side, his importance to the team becomes all the more obvious.
Laurent Koscielny is faster, more technically accomplished and offers more bringing the ball out of defence. However, whilst Mertesacker seems to calm the side down, Koscielny has the opposite effect of sparking panic and confusion in the defensive line.
CB Thomas Vermaelen (6/10)
Thomas Vermaelen's battle with Ba was a fascinating one. The Senegalese striker's goals detract from the fact that he's actually a very intelligent all-round forward.
For the most part, Vermaelen coped well, but he won't be happy to have marshalled a defence that conceded as many as three goals.
DL Kieran Gibbs (5/10)
Kieran Gibbs' performance in this match is difficult to assess, as the quality of his performance seemed to vacillate wildly either side of the halfway line. He was threatening going forward, combining well with Lukas Podolski and squaring for Walcott's second goal after a typical burst to the byline.
However, defensively he was poor and lost his man on Newcastle's second and third goals. Considering that defending is his primary responsibility, I have to reflect that in his score.