The Roma defender gifted a penalty to Austria when he rugby tackled Marc Janko in the area.
Mexes said: “I think the penalty was very avoidable. It was more like playing rugby than football. These are the types of mistakes you cannot make at international level. I am a bit disgusted with the way things went.
“I think we could have done better. On free kicks, you pick up the man you mark him and make sure he doesn’t score.”