Novak Djokovic achieved the unthinkable on Friday when he defeated Rafael Nadal 3-6, 6-3, 7-6(4), 6-2 after coming back from a set down in the French Open semi-final at the Philippe Chatrier court in Paris.Novak Djokovic knocked out defending champion Rafael Nadal 3-6, 6-3, 7-6(4), 6-2 to set up a summit clash against Stefanos Tsitsipas on Sunday.