Is it haram to make predictions when you are pretty sure it's not gonna happen?

Assalamualaikum, i actually yesterday was watching a basketball match, some of my friends just made a prediction of which teach will win and just try to predict score and they were totally sure that its probably not gonna happen like they weren't completely sure that prediction is gonnw come true. And also is making prediction based on some things you observe in environment or studying it or by seeing a team's past matches and their playing form haram