Mythbusters of top eleven

[Tactician]

But some times I wonder if there is a roll dice about a pack of two games we have in a KO round of the Cup or CH.L.
I noticed some times (but rare), that whatever I 'll do, in the first or second leg, I can't get over a team which is worst than mine (or playing with weird formation). I have the feeling that the qualification is predeterminate.
What do you say ?
Myth or not ?

Indications are there that some matches seemed to be fixed. I have faced situations where it appeared that simply nothing could be done to change the final outcome (that is, win, draw or loss, and which team goes through to the next round). Take into consideration there is still a small possibility of the other team having gone through due to tactics, but I have highly doubt it.