I like how this is zoomed in tight; however, I don't necessarily feel sadness. It comes across to me more like he has a headache. Regardless, I like the detail in the image, and I realize that capturing sadness can be difficult.
B&W tones are excellent and call attention to a gritty 'angst' feel. But if one just judges from the photo itself, the audience can read it one of two ways. The hand on the head and the closed eyes could speak anguish and sadness OR it could be interpreted as physical pain such as not feeling physically well/headache. At times I do see the emotional anguish/sadness but upon other viewings I see it as the actual physical pain as in a headache. Within the photo itself there are no other clues for me, the audience, to draw from to make a firm and strong conclusion. Had there been a single tear on the cheek that would have been the extra touch and defining clue that would without a doubt place the reading as sadness. It is your title that then tells me which way to read it. It is a good shot but I feel it would be an even stronger shot if one did not have to refer to the title to make a firm conclusion. (not voting)