Big-serving Zheng marches into last four of WTA Finals

China’s Zheng Qinwen powered into the the semi-finals of the WTA Finals in Riyadh after claiming an impressive 6-1 6-1 win over Italian fourth seed Jasmine Paolini.

In her WTA Finals debut, the 22-year-old became the youngest player to reach the last four at the event since Petra Kvitova in 2011.

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