Serena Williams and Olympia Williams, twins, in matching workout gear on the tennis court

Serena Williams and Olympia proved they were the most excellent mommy-daughter sports duo when they posed in matching outfits in an adorable Instagram photo on Thursday.

Serena Williams and her four-year-old daughter Olympia are fashionables on and off the court! On Thursday, the tennis pro, 40, showed off her and her mini-matching me's an athletic gear in an adorable Instagram post, simply captioning the photo, "Next?"

Williams and Olympia are seen in the photo wearing matching black and pink color-blocked Nike workout gear the same one the 23-time Grand Slam champion wore at the Australian Open in 2021 while sitting back to back on the tennis court, hands clasped.

Williams wore her long, wavy hair in a low ponytail, smoldering at the camera while showing her giant sparkler on her ring finger. In contrast, Olympia wore her hair pulled back and gathered at the top of her head, smirking at the camera while subtly showing off her little tennis bracelet.

While Olympia and her mother have both worn the outfits separately, the photo Williams shared on Thursday sees to be the 1st time the two have worn them together.

The mother-daughter duo is known for their matching outfits from sparkly red carpet looks at the recent King Richard premiere to pink ballerina outfits, the two are constantly twinning, whether they're attending an event, playing tennis, or simply hanging out at home.

In January last year, Williams opened up to news about the profound impact starting a family has had on her.

"It gives me a so much of reason beyond what I do, so it's essential," she explained. "I've spent my entire life focused on my career, but after having a family and getting married, I realized there's so much more to life. That was fantastic."