First of all, be careful with the use of the word "experts", none of us are experts.

secondly, being present will not guarantee you the win, it's down to the team, the possession bonus is there to give your team a boost.
Maybe you got the tactics wrong or he got his right? maybe your team just didn't perform?

Upsets do happen. He could of easily man marked, defended and countered your team using your own tactics against you.