FILE - In this Sept. 5, 2019, file photo, Bianca Andreescu, of Canada, reacts after defeating Belinda Bencic, of Switzerland, during the semifinals of the U.S. Open tennis championships in New York. Reigning U.S. Open champion Bianca Andreescu has pulled out of the Grand Slam tournament. She says the coronavirus pandemic prevented her from properly preparing for competition. (AP Photo/Charles Krupa, File)