Video: Roddick and Djokovic imitate Nadal

Some things never get old: the "Summer of George" episode of "Seinfeld," Kimiko Date Krumm, the Vince Gill song "Some Things Never Get Old" and, especially, watching tennis players playfully mock one another with on-court impersonations.

Andy Roddick and Novak Djokovic fulfilled the latter over the weekend when they took turns imitating Rafael Nadal at an exhibition in Seoul:

Though Roddick's Nadal is pretty good, Djokovic's is Rich Little good. The only thing he needs to do is add some subtle glances to the coaching box to get signals from an imaginary Uncle Toni.

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