The Djokovic-Nadal showdown is as hot as any rivalry in the modern era. Federer vs. Nadal has been spectacular but, come on, we all pretty much knew Rafa has had the upper hand from the get-go. With Djokovic and Nadal it's different. It's more evenly balanced. Djokovic won the last match, Rafa the previous three and Djokovic the previous seven in a row.