The Red Group is back in action on Wednesday. Serena Williams and Simona Halep will meet to decide who will stay unbeaten while Eugenie Bouchard and Ana Ivanovic will be desperate to notch a victory.
Caroline Wozniacki and Maria Sharapova opened White Group competition with a white-knuckle match.
The WTA coaching app, which has been used this season by players and coaches post-match, will be available for use by players when they call their coaches on court during matches during the 2015 WTA season.
Monica Puig finished with a perfect record in the inaugural WTA Rising Stars Invitational by beating Zheng Saisai in Tuesday's final.
Fans and players share their experience from the BNP Paribas WTA Finals presented by SC Global in Singapore.
Red Group foes Serena Williams and Eugenie Bouchard will face off during the WTA Finals in a possible representation of the present and future of the WTA.
Simona Halep was nursing a hip injury coming into the BNP Paribas WTA Finals Singapore presented by SC Global, but showed no sign of that in her first round robin match on Monday.
Simona Halep made a flying start at the BNP Paribas WTA Finals Singapore presented by SC Global, brushing aside the challenge of fellow WTA Rising Star Eugenie Bouchard in little over an hour.
Some facts and figures about the participants in the BNP Paribas WTA Finals Singapore presented by SC Global.
Maria Sharapova begins her quest for No.1, Agnieszka Radwanska hopes for some déjà vu, one WTA Rising Star will reign supreme - get ready for the day here!
Sign up to receive updates and exclusive invites.