Seen a few highlights now. Just wondering if Luiz could have stayed on his feet - if you're going to give away a pel anyway then you might as well just concede the goal and stay on the pitch.
But Mustafi's brainfart was the root cause.
Martinelli's finish was nice and cool, Bellerin's goal was brilliant.
Overall, a good result in the circumstances.
Arteta deserves some time to work with this lot.