How did he win?

[vad]

In the screenshots, you can see that the guy has won friendly match despite my big advantage in player quality. So I wonder, was it due to possession bonus, or his odd formation, or just luck?

As a little background, he apparently befriended me in order to help his friend, so this friendly match with me before the important game with his friend (much stronger than his own team) was his help. I won the important one anyways. But I wonder how he won this one, and from this angle his formation looks especially intriguing.