Mertesacker says Arsenal have a gameplan to combat the threat posed by Tony Pulis' side, but must remember their own strengths as well.
"That is very important against Stoke: to focus on our own game and cope with the long balls and the physical side of things. And then get the ball down as quickly as possible and show what we can do.
"We will try to put them under pressure so they can't play those dangerous balls into the area, and don't have a lot of set-pieces. We have to get them away from our goal and focus on what we need to do."