Serena Williams reacts after winning a tiebreaker to take the first set against Kiki Bertens, of the Netherlands, during the second round of the U.S. Open on Sept. 2 in New York.
Serena Williams reacts after winning a tiebreaker to take the first set against Kiki Bertens, of the Netherlands, during the second round of the U.S. Open on Sept. 2 in New York. Matt Rourke The Associated Press
Serena Williams reacts after winning a tiebreaker to take the first set against Kiki Bertens, of the Netherlands, during the second round of the U.S. Open on Sept. 2 in New York. Matt Rourke The Associated Press