Arsenal boss Unai Emery were impressed by West Ham after their win on Saturday.

The Gunners came from behind to win 3-1.

Emery remarked: "They are also a good team with a good coach and good players. Also, they can give us problems for our defence. It's clear that if we defend with more people in the moment, we can lose our performance for the attacking moments.

"For that, we need the balance not to lose our attacking moments with this balance. But I think we need to improve.

"Today, I think the first half and the second half is very different. I think in the second half we found this balance better, because we spoke in the dressing room and after the substitutions of players, it made a difference in the second half and it is very important also to help and we need every player."