Tennis and football betting, if you say 'luck' it's right, however, if you talk about 'predictions' in guessing there is no success 100%, you can be sure 70% it all depends on how active you are seeing the games they play every round or tournament, be it tennis and football.

Example: Atlético Madrid vs Liverpool.


My predictions are: Liverpool 70%, and 30% luck.

That's one example of soccer betting, tennis is not much different, just one on one, just need one perfect.

For that, overall you need to be active and see the development of Team A and Team B, every time they play a match, you will have a strong instinct in determining A or B who wins, the possibility can succeed, but it can also be the opposite, the point: you need to be active in watching both tournaments.