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.”