The Reds manager slammed the new competition, which was introduced to limit the number of friendlies between international nations.
He said ahead of a meeting with England on Friday: "I agree with Klopp, the Nations League is a ridiculous competition.
"There is no sense in playing these games. It's not a real competition that you have to win.
"You can call these games whatever you want, but the fact is they are friendly games!"