The Reds are the Premier League’s in-form side, winning their last four games on the bounce and moving to within two points of leaders Manchester City.
Klopp has also got Liverpool firing in front of goal and they are the joint top scorers in the league along with Pep Guardiola’s City.
And Lewandowski, who worked with Klopp at Borussia Dortmund, believes Liverpool are now serious title contenders thanks to their new manager.
“Under Klopp I think they will be fighting for the title this season,” he told Goal.
“Pep and Manchester City will not make it easy for anybody to win but Liverpool have a real chance.”
And the Poland international has shed some light on what it’s like working under Klopp, claiming the Liverpool players will have been instilled with a new-found confidence.
“I have watched some Liverpool games since the arrival of Klopp, and you can see that the players are enjoying playing for him,” Lewandowski added.
“As a player you know that he totally has your back – he is like a father-figure.
“Because you have that trust in him as a player it makes you totally open to his methods and his ideas.
“In the long term, you always see they are for the benefit of your game and for the team.”