I do not think that using math or other predictions you can win in gambling, and especially in roulette. There everything is designed for pleasure, not profit.
Prediction in gambling will work for sure. That is also especially in sports betting like football, rugby and tennis. You have to analyze the complete aspects about the each player in the team and strengthen team will definetely win and they will only have a chances to win most of the time. So you can choose concern team can win with your knowledge.