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WTA Finals: Top eight chase record $14 million pot

(CNN)What a year it has been for women's tennis. For the second season in a row, all four grand slam singles titles were won by a different player, while we also saw the breakthrough of bright young stars such as American teenager Cori "Coco" Gauff.But who will be crowned the best of the best at the WTA Finals in Shenzhen, China?The year-end finale pits the top eight singles players and doubles pairs in round-robin action before a knockout phase for a slice of a record $14 million purse. Here are the five biggest story lines for the showpiece event, which begins October 27:The most open WTA Finals in recent memory?From Ashleigh Barty at No. 1 in the standings to the final woman to qualify, Elena Svitolina, who just happens to be the defend ...