In response, Serena simply posted an image of herself hugging her daughter, Olympia.
"I love these pre match hugs. They are my new fav part of my job," she wrote.
Within minutes, the image racked up the double taps.
Family first is something Serena spoke about ahead of entering the new year.
"It's not about what we can do it's about what we must do as working moms and working dads. Anything is possible. I am getting ready for the first match of the year and my dear sweet baby was tired and sad and simply needed mama's love. So if it means warming up and stretching while holding my baby, then that's what this mamma is gong to do."
You can read her full, touching post below.