Novak Djokovic sets a major record- the most weeks ever at pole position of the ATP rankings. Roger Federer returns to competition in Doha after more than a year off. And how do each of the Big Three effectively deploy tennis' most important shot -- the serve? Amy Lundy, Joel Drucker and Gill Gross address these topics on the latest episode of "Three -- A Show About Federer, Djokovic and Nadal."
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