Arsenal goalkeeper Wojciech Szczesny admits they were "battered" by Swansea City on Saturday.
The Gunners lost 2-0 to two late Michu goals.
The Pole told supporters: "We got battered and there's no hiding from it - they were the better team from start to finish and it makes it even harder for us. Of course, the confidence is knocked a little bit after a game like that but we are going to work even harder to make sure we get everything right on Saturday against West Brom because we just must win that game."