Caroline Wozniacki, of Denmark, reacts after losing a point to Ekaterina Makarova, of Russia, at the U.S. Open tennis tournament, Wednesday, Aug. 30, 2017, in New York. (AP Photo/Julio Cortez) - Easy Branches

Caroline Wozniacki, of Denmark, reacts after losing a point to Ekaterina Makarova, of Russia, at the U.S. Open tennis tournament, Wednesday, Aug. 30, 2017, in New York. (AP Photo/Julio Cortez)

Caroline Wozniacki, of Denmark, reacts after losing a point to Ekaterina Makarova, of Russia, at the U.S. Open tennis tournament, Wednesday, Aug. 30, 2017, in New York. (AP Photo/Julio Cortez)