Lovren helped Liverpool win the Champions League under Klopp in 2019.
He told Sport-Express: "I'll call it work ethic. Klopp challenges the players to work hard. That is why I want to show everyone: it doesn't matter if you play against Arsenal Tula or Lazio with Borussia, the mood should be the same.
"So for me it doesn't matter who Zenit meets - Spartak or Ufa. In any case, I give myself one hundred percent. I would like to convey this approach to the younger generation."