Angelique Kerber will be the first alternate in Singapore. Five WTA stars will battle it out in Moscow next week to become the second alternate - who are they?
How did Maria Sharapova become the second player to qualify for the BNP Paribas WTA Finals Singapore presented by SC Global?
Last year, Simona Halep left her run too late to make the WTA Finals, but this time around she was a paragon of consistency throughout, securing qualification with room to spare.
Maria Sharapova's dominant clay court season, highlighted by a second French Open triumph, helped secure a spot at the WTA Finals for a seventh time.
The foundations for Maria Sharapova's successful bid for a place at the BNP Paribas WTA Finals Singapore presented by SC Global were laid on clay.
Worryingly for the rest of the WTA, Sara Errani and Roberta Vinci are showing no sign of slowing down and arrive in Singapore on the back of another silverware-laden season.
Holding up the trophy - it's what everyone's after. But what's the story behind the WTA Finals trophies? Find out in Road To Singapore: The Series, presented by Xerox.
You cast almost 700,000 votes from 140 different countries, and the results are in - we now know the four WTA Rising Stars who are headed to Singapore...
How did Serena Williams become the first player to qualify for the BNP Paribas WTA Finals Singapore presented by SC Global?
Serena Williams may have had a few fitness scares since her US Open triumph, but she will still start the BNP Paribas WTA Finals Singapore presented by SC Global as the clear favorite.