Serena's baby Ohanian Jr. got it from her mama

Just two days after Serena Williams shared the first photo of daughter Alexis Olympia Ohanian Jr., the tennis all-star returned to social media with yet another adorable snapshot of the newborn. 

In the photo, Serena and fiancé Alexis Ohanian's first bundle of joy is fast sleep in a onesie that reads "Smart and Strong like my Mama"—which couldn't be more accurate given the tennis all-star's legendary status in the sports world. 

"Biceps," the caption read, referencing her tiny muscles. Too cute! Little Olympia even has her own Instagram account with 17,000 followers and counting.