Serena Williams reacts after a point against Yaroslava Shvedova, of Kazakhstan, during the fourth round of the U.S. Open tennis tournament, Monday, Sept. 5, 2016, in New York. (AP Photo/Charles Krupa)
Serena Williams reacts after a point against Yaroslava Shvedova, of Kazakhstan, during the fourth round of the U.S. Open tennis tournament, Monday, Sept. 5, 2016, in New York. (AP Photo/Charles Krupa)