It's not surprising how the impression from this movie is that "Ali
can't act" -- but a distinction has to be made. Ali was plainly no
dramatic actor; it doesn't mean he 'couldn't act'.Quite the opposite; Ali was a natural in the ring, on TV, in
interviews; he was a gifted, graceful athlete -- sports are now all
about performance, about 'acting', largely because of his influence. He was an intelligent, creative tactician, both physically and
verbally, inside and outside the ring.He invented trash talk. He invented the modern notions of relentless
self-promotion and self-aggrandizement; psychological warfare in sport.
By the time he started affecting young movie actors, it was clear that
it had all come full circle. Wesley Snipes is probably his closest
scion ("White Men Can't Jump").But acting as himself in this hagiography, it's just no use.If you want a good period example of a natural, unscripted Ali
experience, read his interviews with Hunter S. Thompson (in his "Great
Shark Hunt" compendium).