And even with mainstream secular sports, if you listen in on team prayers, which some stations do air, you’ll notice that the prayers are not for victory, but for safety and good sportsmanship, etc.
God is known to intervene for the sake of the righteous in battle with the unrighteous, but that’s about as far as we know that He has providentially supported one side over another. Modern day sports? While He could do likewise, it would be unlikely if simply for the sake of answering prayers for the side that asked for victory. But you never know; if a victory for one side has ramifications and consequences that ultimately serve His holy and unfathomable plans, He might have some influence there.