The Gunners managed to pick up all three points following a goal from Nicklas Bendtner in the third minute of injury time.
“It’s maybe not good for my heart, but for the championship it’s not bad,” he said.
“We have eight games to go, we are in there, why should we not believe?
“What I believe especially is that we will give absolutely everything to do it. You saw that in the game today. We were a bit jaded but we kept going.
“We needed the three points and we got it after the 90 minutes.”