He has long been a strident critic of staging the Nations League this summer, originally insisting it was senseless.
Klopp said: “Everybody looked at me when I said it was not such a good idea.
"And whoops, two English teams are in the Champions League final.
“We play June 1, then on June 6 there is this Nations League.
"If we don't learn to deal with players better, it's the only chance to kill this wonderful game."