World number one Novak Djokovic, yet to play since defeat to Stan Wawrinka at the US Open, said Friday he wanted to rediscover the pleasure of playing tennis. First place in the ATP rankings “is not my first priority any more, it is a secondary thing,” the 29-year-old told reporters in his hometown, the Serbian capital. Djokovic has been forced to pull out of next week’s China Open because of an elbow injury.