If you have luck, there will be a 100% assurance the winning, as in all gambling games needs to have luck to win.
I always like to point to games where the underdog wins and all the commentators are stunned that there was "no chance of them winning"...
The fact is that if you turn up to play your match/fixture you have more of a chance of winning than if you did not turn up at all. There's no such thing as 100% chance a team will win - Not every time at least.
If we select the underdog team, and suddenly, that team can win, we feel that we are very lucky to win on that game because many people and even commentators will not believe that is happening to the strong team. Sometimes, when we select a team that we knew before, that team is underestimated by many people and they think that the team does not have a chance to win. But if our team can give the best performance in the game, that can change the situations and win the game. Yes, there is no 100% chance a team can win, so we do not have to use too big money to betting.