Karolina Muchova ended second-ranked Aryna Sabalenka’s 15-match winning streak with a 7-6 (4), 2-6, 6-4 victory in the China Open quarterfinals on Friday. It was the third consecutive time that Muchova, a U.S. Open semifinalist last month, has won against the three-time major winner and the Czech player now leads their head-to-head series 3-1. Stefanos Tsitsipas and American duo Ben Shelton and Tommy Paul all eased through their second-round matches with straight-sets victories at the Shanghai Masters.