I usually don't like to comment on pictures because whether invited or not, it smacks to me of arrogance (the commenting).
However, I feel this shot is damned good and, for me, would be even better if the tonality was relieved by even a very tiny, but noticeable, area of pure white. You already have deep shadows to justify a very strong highlight which is otherwise lost.
This ain't forensics; even if no such area of white exists, you can always make one, and give what's pretty damned good already something to make it even more so. Trick is to know when to stop!
Rob C