Former world number 1, Serena Williams has pulled out of next week’s WTA Finals, due to a shoulder injury.
The world number two, 35, has not played in any match since reaching the semifinals of the US Open.
Williams’ place could go to British number one Johanna Konta, who is ninth in the rankings, although she has an abdominal injury.
The top eight players qualify automatically for the end-of-season finals, which run from 23-30 October.
Williams, who has won five Tour Finals, said: “I am really, really bombed that I won’t be able to compete.
“It has been a really tough year for me, just dealing with my shoulder injury.
“My doctor insists that I stay at home and heal it every single day so I can have a chance to play next year.”