Rybakina books US Open fourth-round berth, inches closer to No. 1

World number two Elena Rybakina defeated unseeded Ukrainian Yuliia Starodubtseva 7-6 (8/6), 6-3 at the US Open on Saturday, reaching the last 16 and avenging a previous French Open loss to her opponent. Rybakina will next face four-time Grand Slam champion Naomi Osaka, who advanced by beating Belgium's Elise Mertens 6-3, 3-6, 7-5. The result also moves Rybakina closer to the world number one ranking.