The video was viewed more than 1.3 million times in the first 10 hours after it was posted early Sunday with fans lauding the tennis superstar for her bravery in performing the song.

“Amazing Serena, important message and such a beautiful voice!” wrote one under the username deedpaula.

Another alshaze47 commented: “This is powerful!! I’m a Breast cancer survivor!!”

The video appeared less than three weeks after her tempestuous US Open final defeat to Naomi Osaka, where Williams smashed a racquet and accused an umpire of sexism.

Williams, who celebrated her 37th birthday four days ago, pulled out of this week’s China Open in Beijing to bring a premature end to her 2018 season, her first back on tour since giving birth to a daughter a year ago.