Or do another trick, I've done it yesterday successfully
My opponent uses weird formation 3w-1-3w-1-1. So I changed my formation to 4-1-3W-2 few hours before match.
When he saw my formation, he changed his to 4 4 2ND. I waited right moment: 4 minutes before match started I finally set my formation to 3-1-4-1-1 and won the match .