Grigor Dimitrov said Sunday he has tested positive for COVID-19, leading to the cancellation of an exhibition event in Croatia where top-ranked Novak Djokovic was scheduled to play.Dimitrov, ranked No.
19 and a three-time Grand Slam semifinalist, is the highest-profile current player to say he has the virus and his announcement on his Instagram page comes at the end of a week when the U.S.