Arsenal boss Unai Emery admits he sees their clash with West Ham as a must-win.

The Gunners go into the derby after losing their first two games of the season.

Emery said, "In our process we are going to play 38 match, when you are playing against Manchester City it is the same as against West Ham. There are three points you can win from the game.

"It is clear, every game demands different things tactically. After the first two matches we have two defeats. We need to win this game against West Ham.

"But there are difficulties in this game. They are a good team, good players, good coach – he knows the Premier League.

"They have a lot of new players but we are thinking in our way and our work, to create our idea.

"We are preparing well I think. We are feeling well when I look at players in training."