US Open winner Bianca Andreescu and Wimbledon champion Simona Halep are set to meet for the first time at the season-ending WTA Finals at Shenzhen.
They will play on Monday in the Purple Group, which also includes world number two Karolina Pliskova and defending champion Elina Svitolina.
Meanwhile, top seed Ashleigh Barty fought from a set down to grab an opening victory over Belinda Bencic on Sunday.
The Australian’s 5-7, 6-1, 6-2 win means she is set to seal the year-end world number one ranking for the first time.
In the other Red Group match, third seed Naomi Osaka won her opener against Petra Kvitova 7-6, 4-6, 6-4.

Injured Djokovic to miss Madrid Open
Mumbai's IPL campaign fizzles amid Bumrah's barren run
Iran women football players thank Australian government for protection
Villa's Watkins looking to make late push for England World Cup squad
Former Arsenal, Juventus goalkeeper Manninger dies in road accident
