Originally posted on 04/03/2020:

How would you prove the non-existence of something?

It's the same as he would ask you for "real proof" that Jesus did not exist. Or flying spaghetti monsters. Didn't he visit a school or college or something? The normal way is that you have to prove that something exists, not the other way around.

So it's not you who should prove that the match didn't take place but him to provide you with a match report of that game. Very simple.