Mertesacker accepts Arsenal simply cannot afford any more slip ups like they suffered with the recent defeat at Stoke if they are to get themselves back into the hunt for a potential shot at the double, their FA Cup semi-final against Wigan at Wembley set for April 12.
"These are all decisive games. There are no points to drop anymore. They are vital games and we are up for it," the German said.
"I think it is up to us as to how close we can stay to the top.
"We have to concentrate on ourselves and we have to stay as close as possible to the top and that is the most important thing to us.
"It depends entirely on our finish; how we cope with the situation of our injured players and the situation that we have another chance in the FA Cup."
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