In this photo provided by the French Tennis Federation (FFT) Serena Williams, of the U.S, answers journalists at the Roland Garros stadium in Paris, Monday, June 4, 2018. Williams called off her Grand Slam comeback because of a chest muscle injury on Monday, pulling out of the French Open shortly before she was supposed to play Maria Sharapova in the fourth round. (Pauline Ballet / FFT via AP)
PARIS — Serena Williams tried to play through the pain of an injured chest muscle. Eventually, barely able to serve, she knew she had to call off her Grand Slam comeback.