The defender wants to avoid a UEFA Champions League playoff for Arsenal by finishing in the Premier League top three.
Arsenal defender Per Mertesacker is worried his team could slip to fourth in the Premier League, talking up the importance of Sunday's trip to Manchester United.
Arsene Wenger's men looked certain for a top-three finish before they suffered a surprise 1-0 loss to Swansea City on Monday. Still, they sit two points clear of fourth-place Manchester United and have a game in hand on Louis van Gaal's side.
Mertesacker is keen to avoid seeing his team slip to fourth, which would see Arsenal in the Champions League playoffs.