
Elena Rybakina defeated Naomi Osaka 6-1, 6-4 on Monday to advance to the US Open quarter-finals at Flushing Meadows.
Rybakina hit 29 winners compared to Osaka's nine and won 87 percent of points on her first serve, moving one win away from the world number one ranking.
The Kazakh star will face Olympic champion Zheng Qinwen in the next round after Zheng defeated Iga Swiatek in her own quarter-final bid.