As can often be the case in matches of this magnitude, the game can play out like a game of chess with neither manager wanting to risk too much. It can feel at times as if both sides are more intent on avoiding defeat than winning. Therefore while the game may lack numerous chances from open play, a set piece may prove crucial to both sides. In this sense City have been handed a huge boost in the return of skipper Vincent Kompany. As was the case two seasons ago, the Belgian's aerial threat in the opposition box could prove vital. Moreover his leadership skills are fundamental to City's defensive organisation. While United's two dead ball specialists; Wayne Rooney and Robin Van Persie are well known for the free kick ability, this season City's Yaya Toure has emerged as an excellent free kick taker having netted two in four Premier League games to date. Therefore both sets of defenders will be wary of giving away too many fouls in and around the box. Additionally, Joe Hart and David De Gea will both have to be on top form come sunday. While the Spaniard is a word class shot stopper and has improved tremendously since his arrival at Old Trafford, his presence is often questioned when balls are floated into the box. Many still believe that De Gea lacks the strength required to command his area effectively. Joe Hart's form is patchy to say the least. The England stopper has come under scrutiny for his performances for club and country, specifically for the long range effort he conceded against Scotland and the two Frazier Campbell headers that he failed to deal with in City's away defeat to Cardiff. If both defences can stifle the opposition in open play, set pieces may end up being crucial in the outcome of the derby.