As others said, Foxx shoots him in the right chest during the close-quarters shootout at the end. His only other wound before that is the shot to the face (not quite sure what that was supposed to hit, I thought cheek but later it appears okay).
Quentin, I totally agreed with that in my review of the film (which I just posted). The script is pretty ugly when you peel away Mann and some of the other talent on this film. Endless coincidences, endless on-the-nose dialog...well, not even OTN, but rather dialog that says "here is what...