There is no secret formula else I'd be rich. An English astrologer, John Frawley, made quite a reputation for himself with sports prediction. He didn't use natal charts for team sports (individual sports like tennis and boxing are more suitable for that); he used horary and event charts. And since he's European, the bulk of his predictions have to do with European football.
He even wrote a book on the subject: Sports Astrology. Keep in mind - nothing is foolproof and he isn't right 100% of the time. If you bet on the favorites every game, you'll win about 70% of the time (which is why coin tossing is a sure fire loser), but you'll never make any money. The trick is knowing when to bet on the underdog.
A late 19th early - 20th century astrologer Sepharial developed a system for betting on horses: the holy grail of astrology sports prediction. He never revealed how he did or if he bet at all. But he obviously didn't have the horse's birth charts. I saw Secretariat's chart a long time ago. Very impressive.
Sports Astrology by John Frawley, Apprentice Books UK, 2007