As a guest in the show ‘The Witness’ on RTS, the best Serbian tennis player Novak Djokovic says that the most important thing to him is to always be surrounded by people and professionals who will improve his game. Shades decide in the matches against Federer, Nadal and Murray, and noone is unbeatable, says Novak. Nadal is justifiably the best player in the world, and his greatest advantages are patience and stability.