He's a good player,what makes you think he needs work on his endurance?
Looks to labor a little after repeat efforts in the games have watched.
Also has a pretty heavy set body that could do with some tuning up.
Though if true, that can be seen as a positive as he has some scope to improve physically.
Just an observation and nothing more. You think he's fine in that regard?
He's a powerful bastard and built for the game though.