It seems to work.
My cup game was away against a opponent with the same amount of stars as me.
I won every stat except possession, i forgot to watch the game and he did, so he won that with 52:48.
I won the game 0-1 with a early injury.
If i had watched the game the possession would have been 46:54, i could have done a better sub. And maybe scored a few goals more.
I had to score one more for a tie, so sadly im out already from the cup.