Serena Williams and Eugenie Bouchard have been drawn in the same group for the 2014 WTA Finals in Singapore.
Defending champion Williams has also been pitted against former French Open winner Ana Ivanovic and Simona Halep in the Red group.
Meanwhile, Wimbledon champion Petra Kvitova will meet Maria Sharapova, Agniszka Radwanska and Caroline Wozniacki in the White group.
The tournament, which starts on Monday, sees the top two players from both round-robin groups go through to the semi-finals.