It is 100% going to be easy to get visa if you have a ticket. I do not doubt that if you arrange everything accordingly, it is going to be 100% guaranteed you will get in unless you are wanted for something or other. If you get a few tickets for the game, a booking for a hotel, and the plane tickets to enter and leave, that would give them all the proof that they need to trust that you will get in and out.

Only people who won't be able to do that could be people who have no jobs, no nothing, and they look like they may stay there and that is a very very specific amount of people, 99% of the people with these information when they apply will get in, there won't be any trouble. How do I know? I have a friend (well a friends father) who goes to every single world cup and he does this and had zero issues in any nation at all.