Jeremy Renner: I'm No Match For Usher

Jeremy Renner's had tons of kickass roles in Hollywood -- from 'Avengers' to 'Mission Impossible' and the 'Bourne Legacy' -- but he still won't step in a boxing ring ... with Usher.

Renner's next role is playing a boxer in a Marciano biopic, but he's got a completely different idea for the leg work than Usher's two-a-days to play Sugar Ray Leonard.

Think ... Popeye.