Defeat for Tottenham at Chelsea last night sees the Reds' top four finish secured.
Klopp said: "After last season we speak today three games before the end of the season about qualifying for the Champions League, which is an achievement.
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"That's how the perspective can change during the season because for a while we looked like we can go all the way and stay in the (title) race for longer. That didn't work out but it's still probably third place in the league behind two teams who have done really well.
"I know mathematically there is still a chance."
On hosting Tottenham on Sunday, he added: "We will have to be prepared. We will have to defend really compact. If we don't do that then we will play through us because the idea is really obvious. They have worked together nearly a year."