Aga is the defending champion, but this year's group looks a lot different than last year's group (Flavia retired, Petra missing the cut, Lucie suffered injuries and Maria on a drug suspension).
The Red Group:
Angelique Kerber
Simona Halep
Madison Keys
Dominika Cibulkova
The White Group:
Agnieszka Radwanska
Karolina Pliskova
Garbine Muguruza
Svetlana Kuznetsova
The Red Group:
Angelique Kerber
Simona Halep
Madison Keys
Dominika Cibulkova
The White Group:
Agnieszka Radwanska
Karolina Pliskova
Garbine Muguruza
Svetlana Kuznetsova