China's Zheng Qinwen celebrates after winning her women's singles group stage match against Kazakhstan's Elena Rybakina. As a last-minute qualifier to the 2024 WTA Finals, reigning Olympic champion Zheng has again put the steely will that drove her to top of the Paris podium on full display, after the world No 7 pulled off a 7-6,3-6, 6-1 win over group …