Dzeko was heavily man marked throughout the game, three defenders pretty much constantly on him. Take for example the 4th goal. The three defenders around him meant Tevez was completely on his own in the middle, nobody at all marking him which allowed him a free header. I can see a lot of teams doing that this season, so Tevez is really going to benefit by the presence of Dzeko in my opinion. Of course when he gets up to full match fitness I expect Dzeko to bag a few as well, he certainly showed some promising signs.