Tennis: Japan's Kei Nishikori tests positive for Covid-19 ahead of US Open

August 17, 2020 3:34 PMNEW YORK (AFP) - Japan's Kei Nishikori, the 2014 US Open runner-up, said on Sunday (Aug 16) he has contracted Covid-19 and has withdrawn from an ATP event in New York with this year's US Open only two weeks away.