Klopp has lost all three of the cup finals he has appeared in as Liverpool boss, while the club has not won any silverware for six years.
Mourinho suggested trophies were important, but dismissed the idea Klopp should be solely judged on his silverware record at Liverpool.
And Klopp agreed with his rival manager. Do I have to? Do I have to win it? he said.
If people say the Champions League campaign last season was not a success because we didnt win the final then I cannot change that. Was it the successful finish? No, but the ride was brilliant.
I enjoyed it a lot. Going to the final was fantastic but in life – in all departments of life including your job – if only the best counts and effort doesnt count then life is s***.
You can do whatever you want but if Im not as smart as Einstein or whatever, I cant try a little bit? I will never be him.
I love the challenge. Make the best of it. That is how I understand life, I learned it a little bit in football. In the end other people have to judge that.
Liverpool are targeting their sixth league win in a row, while United are searching for a morale boosting victory amid a difficult season.
Mourinho often finds success against the top clubs regardless of form, but United are considered the underdogs for the clash on Sunday.
And United are sweating over the fitness of nine players. But, Liverpool too face an injury crisis in defence, despite Klopps attempts to play down concerns ahead of the game.