Williams didn't stand for it.
"The day I stop fighting for equality and for people that look like you and me will be the day I'm in my grave," the 23-time Grand Slam champion said.
"She's got a baby, she's trying to help gender equity, particularly women of color," King said. "But it makes it much harder. I would like her to put everything else aside, because she's got people working on those things. I wish she would just make a commitment for the next year-and-a-half to two years and say, I'm going to absolutely focus on what's necessary for my tennis, so when I look in the mirror when I'm older then I can go back in my mind and know I gave it everything I had."
"In everything she does, Serena shines a light on what all of us must fight for in order to achieve equality for all," King wrote.
"The cycles of poverty, discrimination, and sexism are much, much harder to break than the record for Grand Slam titles," she wrote.