Vermaelen, 26, said: "We certainly won't be looking at Tottenham, only ourselves. We have some difficult games. Everyone can beat everyone else in this league and, of course, we had a few ups and downs earlier in the season.
"Being in the Champions League is very important and we know finishing third gives you straight qualification for it.
"Finish fourth and you have to play a qualifier. But it's not going to be easy because there are still a lot of games to play. We'll just stay focused and see how far we go."