wimbledon surface why is federer's serve so nasty on grass?

wimbledon surface: because is federer’s offer so nasty upon grass?
federer in all has a funny offer though upon weed it looks to be invincible, it wasnt untill roddick did he met his compare in wimbledon this year. as well as federer served 50 aces. what about a aspect creates federer so most improved upon it than upon tough courts.

Answer by Troy SPhinx
he likes weed some-more than grass.

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