Tennis super star Serena Williams has opened up about motherhood,The former world No. 1 posted to her Instagram account Monday night saying she has been battling with postpartum depression, and that the root of her struggles last week was that, “Mostly, I felt like I was not a good mom.”

“I like communication best. Talking things through with my mom, my sisters, my friends let me know that my feelings are totally normal,” she continued.

“It’s totally normal to feel like I’m not doing enough for my baby. We have all been there. I work a lot, I train, and I’m trying to be the best athlete I can be,” Williams wrote. “However, that means although I have been with her every day of my life, I’m not around as much as I would like to be.”

“Most of you moms deal with the same thing. Whether stay-at-home or working, finding that balance with kids is a true art,” she continued. “You are the true heroes.”

Williams added, “I’m here to say: if you are having a rough day or week — it’s ok — I am, too!!! There’s always tomm!”