The whole problem this season for Liverpool is that Van Dijk is not playing. it is a big mess in their defense every game.
Van Dijk is a key player in the defence line and his absence among other players made Liverpool looks miserable in different leagues. Klopp mission right now is to join CL (or EL) next time.. maybe.
Van Dijk is really key player for them but after extraordinary season they completely fail in this season, and now they are facing very tough time as they are looking for spot in Champions League or Europa League Klop need to change tactics for next season if he wants to do some good because now they are going to be more tough time for them in next season as few teams already on improving side and have enough things for fighting and bringing shocking results.