What Happened to Novak?

"If Djokovic doesn’t get bored or injured, he could reign supreme in tennis’ greatest era. And that will make him the greatest tennis player of all time."

-- Me, a little more than a year ago.

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No, it's not really cool to quote yourself at the top of a story, but there is a point: Novak Djokovic no longer looks like the greatest tennis player of all t…