Klopp is delighted with the young midfield duo's progress.
He said: "There have been challenging times, but something good has also come out of it.
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"The very young have come in and performed - others have really just improved. Curtis Jones has made crazy strides, Harvey Elliott has really developed nicely as well.
"If you have to buy the two boys, you will have to spend a lot of money. We already have them, so that's good."