Spurs are fifth in the table and seven points behind Manchester City, who have three games in hand.
"I do not want to look at the table anymore because the gap (to the top four) is very big," said Vertonghen.
"All four sides at the top are stronger than they were last year and we have stayed at the same level. If you see last season, then we did not improve.
"I think we do have the players to achieve Champions League (qualification) and I hope we can achieve it next year."
And the Belgium defender knows his club have little time to dwell on their missed opportunities against the Gunners as they have to face the second leg of their Europa League tie away to Benfica on Thursday night, in which they trail 3-1.
"Of course we are all disappointed but we will try to come back with some good results," Vertonghen said.
"It is difficult now but we have to (pick ourselves up) and go again."
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