"I need to listen to my body," four-time Grand Slam champion says in withdrawal.
"He wants to be loved so much, Novak," Bryan Shelton said of US Open champion.
Nick Kyrgios gives brutal reality to check to Simona Halep supporters.
Alize Cornet will not play in WTA Tournaments in China this fall.
"If anyone has to be criticized, it is the ITF," world No. 1 Novak Djokovic said of the current Davis Cup debacle.
The 36-year-old says he has to reinvent himself every year to keep the sports' young guns at bay.
The World No.1 was back to share an historic moment with the people of Serbia.
