Belinda Bencic Takes Out No. 1 and Defending Champion Naomi Osaka in the US Open Fourth Round (September 2, 2019) FLUSHING MEADOWS, NY – Defending champion Naomi Osaka has been knocked out of the US Open. The world No. 1 fell to No. 13 seed Belinda Bencic of Switzerland 7-5, 6-4 on Monday in Arthur Ashe Stadium. Bencic is now in the quarterfinals of the US Open for … [Read more...] about Belinda Bencic Takes Out No. 1 and Defending Champion Naomi Osaka in the US Open Fourth Round