Ok first the 10-0, I did some more research, the teams might have been equal or his team might have been a bit stronger in total but that was probally because I still had some bad players on reserve that I hadn't sold yet. The 11 players who played the game were better in my team. He had 3 players on the wrong position aswell. And yes there was a red card.. but for my team xD He got 1 injury though so that compensates. I remember I was very supprised after this win since I just had a match before this one (3:30 hours earlier + I didn't spectate and it was in his stadium. So quite a remarkable game.
In case you're wondering, his goalkeeper was on the right position and was one of his best players.