Despite failing to score a goal of their own from a corner yet this season, the Gunners have often looked vulnerable defending in the same situations, and Mertesacker is eager to see the team make progress in that department.
"We need to improve on that this season because we've conceded from them already," the German defender told the club's official website.
"It's all about reminding ourselves how good we are in the air from set pieces, but we have to get to the ball and stop opponents getting into dangerous areas. That's what we need to improve.
"A lot of it has to do with concentration, strictness and good deliveries and good timing. We have to make sure that we are ready and concentrating on every set play."
Arsenal meet Hull City at the Emirates Stadium on Saturday afternoon.