Kei Nishikori to skip US Open despite negative report

Japan's Kei Nishikori withdrew from the US Open on Wednesday and announced he has tested negative for Covid-19 after two positive tests forced him out of a tuneup event. Nishikori, 30, was the 2014 US Open runner-up and the first Asian man in a Grand Slam singles finals. His two other best Slam showings, semi-final runs in 2016...