China's Zheng Qinwen beat a struggling Elena Rybakina 7-6(4) 3-6 6-1 in a gruelling WTA Finals group stage match on Monday, notching her first career win over the Kazakh in their third meeting.Seventh seed Zheng bounced back from her initial round-robin loss to Aryna Sabalenka to become the second Chinese player,

Elena Rybakina is on the cusp of becoming the first player to be eliminated from the WTA Finals after defeat by Zheng Qinwen.

Zheng Qinwen improved her chances of advancing to the semi-finals at the WTA Finals with a 7-6 (7/4), 3-6, 6-1 victory over world number five Elena Rybakina in Riyadh on Monday.