I'm not sure that I could give notes to someone that I revere. That's a general challenge of directing, giving notes to someone you revere. The other big contribution to this, which most people I show footage to take note of is Mauro Fiore's cinematography is unbelievable.

If you go to any fight, whether MMA or boxing, there's a whole musical soundscape to these events. There's pre-event pump up/psych-up music, there's fighter introductions, there's between rounds, so my musical needs are really diverse.

I'm not sure that I could give notes to someone that I revere. That's a general challenge of directing, giving notes to someone you revere. The other big contribution to this, which most people I show footage to take note of is Mauro Fiore's cinematography is unbelievable.

I think that, on the one hand, our audience, our culture is so savvy now to an assumption that teaser effects are not fully representative of the final product. But in the same breath, I would say there's no shot in the teaser that I'm not really happy with.

As opposed to a movie [Real Steel] where everything feels fantastical, it was really important to me, and I recognise it's not the first movie with robots in it, but that blend of naturalism in performance, writing and design with the futurism of this sport. That was the idea.

The dozens of people working on this at Digital Domain, they knew that you couldn't get away with almost photo real, because we had real real in the room. You have real real in the cut every four or five shots, so you have this constant yardstick built into the footage by virtue of there being no real robot there. So it became the standard of photo reality that the VFX team had to match.

I would say, while I think audiences are savvy enough, I think that the effects work in the teaser is quite a bit more than presentable. I think they look good and representative of the film. The harder thing with the teaser, interestingly enough is, how much to show.