knockout berth とはどういう意味ですか?

質問を翻訳

Knockout in this context is referring to the knockout round of a tournament. You first have the group stage followed by the knockout rounds. In the knockout round if you lose your game you are knocked out of the tournament. Berth means there are only a certain amount of places or space. In the sentence from your picture it would mean Korea is the first country to earn one of the few spaces in the knockout round.