World No.1 Angelique Kerber made a winning start to her campaign at the WTA Finals in Singapore, but she was made to work hard every step of the way by an inspired Dominika Cibulkova.
WTA Insider Courtney Nguyen | What are the biggest storylines coming out of Simona Halep's straight-sets win over Madison Keys to kick off the WTA Finals?
No.3 seed Simona Halep put on a decisive display to dispatch No.6 seed Madison Keys in straight sets and take the early lead in her Singapore round robin group.
In the first of two Day 1 WTA Insider Live Blogs, catch up on No.3 seed Simona Halep's decisive win over Madison Keys to kick off round robin play in Singapore.
WTA Insider David Kane | The last open spot at the WTA Finals came down to the wire, and both Johanna Konta and Svetlana Kuznetsova reflect on the wild weekend that was.
Svetlana Kuznetsova secured her return to the WTA Finals after a seven-year absence with victory over Daria Gavrilova in Saturday's Moscow final.