The runaway Premier League leaders have only dropped two points all season - and bookies have stopped taking bets on them winning the title.
Klopp said, “Where can we improve? Concentration level. Against (Manchester) United, we did a lot of things in the right way, dominated the game in a way you cannot expect before the game, but you do not finish the game off and it is open.
“We were not really in trouble, but they had a few finishes and a big chance in the second half so there is a lot of space to improve.
“What we can do in situations like that, how can we help ourselves, how can we stay lively even without creating constantly? We need to find a common way in these situations to still dominate the game in a slightly different manner.
“But we are all human beings and that is normal."