Possession by it self does not make a big diference.
But being present can make the diference.
I had good and bad results seeing and not seeing, so i prefere to be present Everytime i can.
I cant understand people, as i seen already, that are watching the game, are loosing and do not make nothing to change, not even a substitution.
I think that some people think that by being present and having the better Q Team, they will win every game.
I am not saying that this is the case.