"At this moment, Man City's players are obviously playing the best football in the league. Then, I think we are not too far away to play maybe the second best," he told Sky Sports.
"But still Man Utd have more points, they are more successful in the season and they won the [Champions League] group stage earlier than we did."
"I want to show how big and great this club and how much we can reach in the future if we really are ready to make the steps," he added.
"And every year we want to try and be in the Champions League. But as long as there are only four clubs, then you have the problem that you still have to get a lot of points in the league.
"It is our ambition, we want to be there and I think we have a good chance to do it. But still difficult.
"Our squad is really good and balanced. Since the first day, the only thing people are talking about is we did not buy a centre-half."