The match scenario is decided before the match starts when you can't do more changes in the squad.... and yes, it is influenciable inside some predetermined parameters.
The scenario determines the impact of all players 11+subs and different positions/lines and orders of dominance inside the match and of course the scenario can be in "absolute favour of the other team" and then we can perfectly see that despite change all the mentalities, focus right, focus left, focus centre and sub' it is against us for a poor rating of chances in our favour by default.