Serena Williams is back on the court at Wimbledon, but there’s a big milestone her daughter just had that caused the first-time mom to sob.

“She took her first steps… I was training and missed it. I cried,” Williams tweeted Saturday, July 7 of Alexis Olympia Ohanian Jr.

The post was a simple one but it drew lots of responses from fans, including other moms who were in the same boat at the 23-time Grand Slam winner.

“It doesn’t count until mommy sees it. Nothing counts until mommy sees it.”

“She is practicing so you can see the real ones. ❤,” fellow celebrity mom Chrissy Teigen tweeted.

“You didn’t miss it, mommy. You facilitated it. Your child still lives right there. Make those happy tears & I mean it.”

“Ah, Serena. I’m with you there. I’m in Russia at a World Cup. I watched mine take her first steps on a video ????. She’ll be proud of you when she grows up (I have to keep telling myself).”

“I missed a bunch of firsts while I was at work. I hear ya, mama. It’s not easy. But our girls see us out there grinding + living our dreams and that’s got to mean something. Good luck in London — my daughter and I are both rooting for you! ❤”

“I took my 1st child all the way to Israel on a trade mission. During a meeting, I heard cheering out in the waiting area … Yup, staff and husband and assorted strangers saw her 1st steps. It all turns out okay. #workingmomsrock.”

This isn’t the first time Williams has been candid about tearful mommy moments. When it came time to start shedding the baby weight, Williams realized she was having a difficult time despite working out and following a vegan-only diet.

“I feel like everyone says, ‘You’re so thin when you breastfeed,’” she told reporters at a Sunday press conference. “What I’ve learned through the experience — everybody is different, every person is different, every physical body is different. For my body, it didn’t work, no matter how much I worked out, no matter how much I did, it didn’t work for me.”

So, Williams sat down, spoke to Olympia and got emotional.

“I literally sat Olympia in my arms, I talked to her, we prayed about it,” she said. “I told her, ‘Look, I’m going to stop. Mommy has to do this.’ I cried a little bit, not as much as I thought I was. She was fine.”