"I am still recovering, but getting better. Health always comes first," Serena said.
The WTA's prestigous season-ending event will be played from November 2-9.
This week's ATP ranking risers - and a special milestone for Daniil Medvedev
After Bernard Tomic lost the shortest-ever Challenger final, nemesis Nick Kyrgios responded.
The Pole celebrates 125 weeks at No.1 but will she finish the year there?
The Olympic gold medalist makes history in this stunning Vogue cover shoot.
The American elected for surgery to his right elbow and hopes to be back on court soon.
