So, is this payment for the punch he received or :-) only a couple of pictures in between, recoqnized the guy.
If the shadow on his face was intentional, the nose should have been included. The crop is almost too tight on a photograph at this angle.
The shadow across the face doesn't work. I suspect the sunlight at this time of day would have also been too harsh for a shot facing into the sun, as well. I would have ditched the sunglasses, since they provide too much of a mirror - the photographer is clearly visible. The background is also distracting and makes it look like a hasty shot without much thought put into it.
Great idea for the challenge. The one thing I would change would be to get rid of the sungalsses. Seeing his eyes in a close-up this this could make the shot - especailly if you could manage to get a cool reflection in them.