A touch of fortune went against us with both goals but we weren't at our best at the Emirates.
The game started in typical derby style, all hustle and bustle, few chances and Arsenal's goals actually came after our best spell.
Christian Eriksen hit the post and Harry Kane forced Petr Cech to save at full stretch just after the half-hour but 10 minutes later, we were 2-0 down.
The first goal came from a debated free-kick against Davinson Sanchez on Alexis Sanchez on 37 minutes. Mezut Ozil curled in the set-piece and Shkodran Mustafi headed across Hugo Lloris and home.