Look at all the goals we've conceded against Man City in the last 2/3 years, they ALWAYS score a goal from a corner, winning the 2nd ball inside the 6 yard box.
Wiemann was ball watching as two players ran past him. I don't think he is suitable playing in that right wing/striker role away from home, defensively his position is poor, not ideal when the opposition has almost 70% of the ball.