"This is the business", he told the Liverpool Echo.
What Liverpool now need to do is add some proven, established players to their already impressive squad.
Klopp also spoke about Danny Ings' fitness, with the striker having been out injured since a cameo off the bench in the EFL Cup against Tottenham Hotspur on October 25 at Anfield.
Meanwhile, Liverpool could have to deal with a shortage of central defenders for Sunday's game against Crystal Palace.
"Unfortunately, it's not too positive", Klopp said.
Klopp insisted that Ings is back "in the gym" after a long time and insisted he is "running [again] since a few days ago" and that he "looks good" and "enjoys it a lot" but is "not even close to come back" yet.
"[Klavan] was a very, very small medial ligament, but could be also really not enough time until Crystal Palace". So that is not too cool. "Joe Gomez has made big steps in the past few weeks".
Henderson has been absent for the past eight games after picking up the injury in a routine challenge in training, undermining an initially optimistic diagnosis.More news: Wounded Bartra says blasts 'hardest 15 minutes' of his life
He has scored 14 goals this season so he is another player with confidence and on a good run.
The medical staff haven't put a return date on captain Henderson's recurring foot injury.
"I don't think about it, actually", Klopp said. Wednesday, Thursday, something like this. He can't really train at the moment. But I would say that, at this point, the favourites for the last four are: United, Ajax (2-0 up from the first leg), Celta Vigo (3-2 up) and Lyon (2-1 up).
"We don't talk about things like this, but in this case we can". It's not 100% Lucas can't play, it's not 100% Joel can't play, it's not 100% Ragnar can't play, but they are not in training at the moment.
Third-placed Liverpool are six games away from securing a return to the Champions League and entertain the Eagles on Super Sunday, live and exclusive on Sky Sports 1 HD. And a team which has been prone to buckling under pressure, particularly when unable to play free flowing football, has stood strong.
Klopp not looking to recruit a goalkeeper in the summer.
'It's not unlikely that it could have worked, but it's not important now. "We have to find a line-up solution for the next game". "Having him not involved isn't the best news for Crystal Palace".