This shot has a lot to offer in it in terms of visual interest. The musculature on the players is brought out well with the black and white conversion. There is a lot of action happening here and the slight blur of some of the players works well here. There is some noise in the shot but considering the high iso that was required to capture this image there wasn't a lot that could done to counteract it aside from the noise reduction used in post. The noise actually works somewhat favorably as well giving this a "chaotic" feel to it.
The composition works well though with such action its hard to really have much say in it. As mentioned in previous comments, it is unfortunate that the player behind the subject is also wearing a white shirt. This creates a bit of a visual "blob". While somewhat centered, the lines of the main subject's legs draw your eye across the frame to ultimately come to the soccer ball.
The exposure is pretty well done considering the brightness of the white shirt.
There is a spot (dust spot) right by the left hand of the far right player. Cloning it out would definitely help.
The challenge: Certainly with an international audience there is going to be a lot of soccer shots. This one is quite unique however with the black and white conversion. It also does a good job of demonstrating action.
The motion blur and b&w conversion in this are just perfect. This has a life all its own and makes you feel as though you are a part of the action. Very nice photograph!