The Czech will make her seventh career WTA Finals appearance.
Naomi Osaka has won back-to-back titles with her dad as coach.
Roger Federer talks his responsibility to fans and the sport.
The Austrian will make his fourth appearance at the ATP's season-ending championships.
US Open champion cites wrist injury in withdrawal.
Roger Federer received a hero's welcome in Shanghai.
Goran Ivanisevic earned the most fan votes for the International Tennis Hall of Fame's Class of 2020.
