Serena Williams, of course, is not to be messed with. Serena as a mom? Doubly so.

Williams shut down ugly comments Romanian Fed Cup captain Ilie Natase made about the child she's expecting with fiancé Alexis Ohanian with a classy note on Instagram. In it, she denounces his remarks as "racist."

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“Let’s see what color it has," the 70-year old Natase crudely asked at a press conference when no one asked him to comment on Williams or her baby to begin with. "Chocolate with milk?”

"This or anything else will not stop me from pouring love, light, and positivity into everything that I do," Williams clapped back, also quoting Maya Angelou's "Still I Rise" in the post. "I am not afraid, unlike you. You see, I am no coward," she wrote.

Natase also reportedly harassed British captain Anne Keothavong by repeatedly asking for her room number during the Fed Cup, because his creepiness cannot be contained. The International Tennis Federation suspended Natase after his remarks about Williams. It is currently investigating.

Serena, for her part, was as classy and forthright as ever: "I will continue to take the lead and stand up for what is right," the champ wrote. The internet, in turn, stood up and cheered.

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