Matt Damon thinks his Jason Bourne is tougher, more muscular than Ben Affleck's Batman

Actor Matt Damon says he has worked so hard for the next instalment of "The Bourne" series to build muscle that he is bigger than Batman himself.

Chatting at the premiere of his new film "The Martian", Damon said: "Ben Affleck really bulked up for 'Batman', he was huge.

"He put on like 30 lb of muscle or something but I'm doing Jason Bourne now so I think I've got him.

"I think he may have lost his Batman form too," Damon said.

Before adding: "Anyway Bourne is tougher than Batman without a doubt." Click the Movie button below for more info:
Untitled Matt Damon/Bourne Sequel