Optimistic about the legend of Germany 2017 strong back that Federer still can not be underestimated

Sina sports legend Luft Beijing on December 16th news, said in an interview with Australian legend Luft the day before, Djokovic optimistic about a strong return in 2017. As for the final stage of the season Murray could continue in good condition, strive for further improvement, Luft said not sure. At Roland Garros to achieve a career Grand Slam feat, Djokovic's performance will decline, no singles champion since August...