The Merseyside club have already recruited winger Mohamed Salah from AS Roma and striker Dominic Solanke, whose contract expired at Chelsea.
British media have reported that Klopp is interested in signing RB Leipzig midfielder Naby Keita but a 57 million pound ($74.52 million) offer was rejected by the Bundesliga side.
“We pretty much have all you need. But at the end it is still business,” Klopp told the British media.
“You go out and see the car that you have been dreaming about your whole life… you say ‘here is the money’ but they say to you ‘I don’t want to sell the car’. You say ‘but I have got the money’ but they say ‘I don’t want to sell’.
“They say ‘go for another...