Aryna Sabalenka has secured qualification for the semifinals stage of the WTA Finals with a 6-3, 7-5 victory over Jasmine Paolini, as Zheng Qinwen ended Elena Rybakina's chances of moving on in Riyadh on Monday.

With two round-robin wins in as many matches this week in Saudi Arabia, Sabalenka guaranteed herself passage to the final four as the winner of the Purple Group.

The Belarusian top seed is also just one victory away from locking down the year-end number one ranking, which she is in a direct battle with Iga Swiatek.