A couple of issues I encountered:
1) The fighter was not shot with this composite in mind so he doesn't fit the image well proportionately.
2) I need to reread Matt's book on masking as I didn't get it quite right and you can tell he's been superimposed.
Overall, though, I'm fairly happy considering it was a first attempt.
Lighting on model:
Two studio strobes, behind model to either side with large softboxes and a single strobe directly in front of the model, high, with beauty dish.
Lighting on background:
Ambient light only. 5 Image HDR merged in Photoshop.
Nikkor 20mm f2.8 (background)
Nikkor 85mm f1.4 (model)