Christians, how do you feel about athletes praying to God for a victory?

Do you think it is a “Christian” thing to do? I ask because, in my mind, praying for your own team to win is effectively praying for the other team to lose. That is, praying for someone else’s misfortune. Is that ethical? Is that “Christian”? Do you believe that God would cause one or another team to win (and thus the other to lose?). Do you believe the athletes who make these prayers believe that?