Actually, black is just the absence of white.
Seriously, though, what were your formations? I don't study formations so much myself, but maybe he played more midfielders than you and put up more of a fight regarding possession.
Were your players just about 6*, quality ending in 0 or 5 or just above that? If the opponents were then at the top of 5* range, then the difference in quality isn't great at all.
Did you have any players playing out of position? Was everyone in good morale and condition?