World No. 1 Novak Djokovic dropped some nice words about Rafael Nadal as he called the Spaniard his greatest rival when asked about the former world No. 1 in Madrid. For the first time this season, Djokovic and Nadal are competing at the same event. In Australia, Djokovic was denied participation after his visa was cancelled. Djokovic also didn’t play at the Masters events in Indian Wells and Miami because he was denied entry into the United States. Djokovic played his first Masters event of the season in Monte Carlo but Nadal wasn’t there because he was recovering from a rib …