Nope. It's all about having players with aerial ability. Ba is just one player and the opposition defenders can mark him out very easily when there are a scarce few others who can challenge in the air.. Our crossing is actually good - Cole, Azpi, Oscar, Mata, Hazard are all able crossers and more often than not the crosses fall into a general area in the box but but there are no men attacking it in the box. Demba Ba is one, who else? You can make an argument for Ramires but there's no one else And, Aguero - Silva can score headers is just a childish argument. X and Y can do it is not a argument that A and B should also do it. Aguero is a striker and Silva is not good in the air. He has scored free-headers and he can head the ball but that doesn't necessarily mean he's good in the air