Sabalenka advances to WTA Finals last 4

Zheng Qinwen crushes Jasmine Paolini to reach the WTA Finals last four as the already-qualified Aryna Sabalenka loses to Elena Rybakina.
There have been four days of play, and all eight women have finished two matches. Here are five thoughts on what we’ve seen so far.
Top-ranked Aryna Sabalenka, who had won her first two matches to clinch a semifinal spot, lost 6-4, 3-6, 6-1 to No. 5 Elena Rybakina. It was Rybakina’s first win of the round-robin phase.