Coming from someone that has been in this game for many years I can tell you that there's no such thing as a sure match prediction, you might be good at forecasting and analysing but it doesn't mean that those predictions are sure even if you are on Profit for a week, it's good to have sound knowledge about the teams you are staking on and also their formation but this doesn't mean that you are in control of what is going to happen in the game, so if I'm to edit your subject I would simply say football predictions instead of sure match prediction because nothing saying it's sure means it's hundred percent accurate and that's not possible.
I have no idea why anybody would think something like gambling which it's whole definition boils down to the fact that it's a game of chance would believe there is anything sure about gambling or sports betting. I see different forms of ads about fixed matches and sure matches and I just shake my head because as gullible as it sounds people still fall for it by paying money for such games.
I believe there are fixed matches, but those matches never come out to the public and those are for unmonitored leagues which a lot of bookies don't have on their sites.
There is nothing like a sure match in gambling. In fact, I'll have an easier time believing a person that says a match is fixed than someone who says an outcome is sure. A fixed match is not even sure, something totally different can happen on the pitch and turn the outcome around.
There are people who are good at predicting games and they get it rest a lot, but that doesn't make their predictions sure. There's always a chance of failure in every prediction.