The film acknowledges that the only great opponents left for the pair to face may be each other, but the question of whether they'd ever fight is rendered moot by the time it's actually addressed at the end.
What are people saying?
What are critics saying?
Even with incredible fight footage, however, all we have here is a standard if formless ESPN hagiography, complete with a cheesy cop-show score and little sense of who these guys are outside of the ring.
The New York Times by Jeannette Catsoulis
For those who care about the winning and losing of championship belts, the film's slow-motion attention to pugilistic style and powerhouse punches is thrillingly instructive.
Los Angeles Times by Kenneth Turan
Articulate, thoughtful and funny - hearing Vitali talk about getting used to 100 kinds of cheese in the West is a real pleasure - the Klitschkos are a treat to spend conversational time with. Just don't think of joining them in the ring.
Village Voice by Nick Pinkerton
Fight fans will still find much of interest, including some surreptitious footage of Don King unsuccessfully wooing the young brothers by "playing" Mozart on a player piano.
The indomitable siblings' unusual background, huge size and highly developed intellects, as well as the dramatic ups, downs and rebounds of their interwoven sagas, should result in a fascinating dual biodoc. But the two-hour pic's lack of economy makes for heavy slogging, with no boxing minutiae too small for exhaustive exposition.