She’s a world-class athlete, an activist and a fashion designer.

But Serena Williams was in mommy mode on Monday when she shared a sweet photo with daughter Olympia.

The three-time French Open champ, 37, was the image of motherly bliss as she climbed into her only child’s crib to cuddle with her.

Sweet moments: Serena Williams hopped into daughter Olympia’s cradle for a quick cuddle in a new Instagram post

Both Serena and girl were dressed in all white outfits as they stared at a bulbous little screen with orange buttons while inside of a golden baby bed.

The toy appeared to be Baby Einstein’s Sea Dreams Soother, a $40 light up box containing a cool aquatic scene with accompanying lullabies.

Keeping captionless, the tennis pro let the picture speak for itself.

Having a ball! Olympia is 18-months old. Above the baby girl is seen playing around with mom

While baby Olympia looked serene in her crib, Williams recently confessed to being a less-than well behaved child – at least when on the tennis court.

‘I was a terrible loser,’ she told reporters during last month’s Australian Open.

Recalling an early bout with older sister Venus, Serena said: ‘It was my first match, when I was like 8, and I played Venus, and I lost.’

Sore loser: Serena admitted she was a sore loser during her younger days while taking questions at the Australian Open last month

‘It was the final, and she gave me her first place because I was a terrible loser. And she was like, “Serena, I want you to win,” so she gave me her trophy, and that’s the only one I really keep’

Serena and husband Alexis Ohanian welcomed their baby girl into the world in September of 2017.

The couple announced their engagement in and were married in a New Orleans, Lousiana ceremony in 2017.

Proud parents: Serena and husband Alexis Ohanian (above at the 2017 Met Gala while she was expecting) welcomed their baby girl into the world in September of 2017