I'm fine with either Japan or America winning the finals.
"決勝戦で日本とアメリカどちらが勝っても私はよいです"
- I'm fine with either Japan or America winning the finals.
- I'll be happy regardless of who wins the final match.
- I don't mind if Japan or America wins the finals.
- Between America and Japan, it doesn't matter to me who wins.