The Serbian Gladiator, The Elastic Man Novak Djokovic, the number one men’s tennis player in the world, goes by many names. Professionally, he is Djokovic. Athletically, he is the Serbian Gladiator. To his native country, he is Nole. And to his enemies, he is the Djoker. Nicknames aside, it goes without question that Djokovic is the new dominant force in the pro circuit.