どちらのチームが

which team

→ どちら
phrase Rare #38,490
which team Used to ask or discuss which of two teams performs an action. The が marks the team as the subject.
JA: どちらのチームが勝つと思いますか。
EN: Which team do you think will win?

どちらのチームがその試合に勝つどうでもよい

It doesn't matter which team wins the game.

どちらのチームが勝つわからない

I don't know which team will win.

どちらのチームが勝ちそうですか

Which team is more likely to win?