quite a bit of effort is missing from this render. (no offense intended)
The specular levels look like they haven't been adjusted, if you simply make the textures either really shiny (high, but thin specular level) or really dull (lowish and wide specular level) it will add a great deal to this scene.
Why are there no shadows? you've obviously added a single light source, so shadows are a must, btw, I'd recommend using either a two point, or 3 point light source (to add to the realism, and make the scene more like a boxing match.)
The concept is great, and with a little more effort, the finished product could be as great as the concept.