Rafael Nadal and Novak Djokovic, alonsgide Roger Federer, are considered among the greatest tennis of all time. But who is the best? Former World No. 2 picks and explains his choice.

The Serbian regretted not being there to say goodbye to his great rival on the tennis courts. It's been almost two months, but the farewell ceremony for Rafael Nadal that took place on November 19 at the Martin Carpena pavilion in Malaga at the end of the Davis Cup quarter-final between Spain and the Netherlands is still going strong.

Rafael Nadal's retirement was marked by a ceremony at the Davis Cup last year, though the event has been widely panned and even Novak Djokovic has had his say