The 42-year-old tennis star looked unimaginably conditioned and thin in a white two-piece bathing suit that incorporated a tank top and small shorts tied at the midsection.

The tennis diva wore dark shades as she presented on a yacht while holding her second little girl Adira.

Her her hair was worn up with curly tendrils falling down around her face, and her makeup was light with pale pink lipstick.

‘Loving yourself is essential,’ began her caption as she was candid about her feelings concerning her body.

‘I find that I have to remind myself of that self-love through all different stages in my life,’ added the tennis great.

She then talked her figure, which looked in great shape.

‘Right now I love that my body is not picture perfect,’ she said. ‘I love that I smell like milk – that milk sustains @adiraohanian I love getting to know a new version of my body.

‘It is a change, but it’s a change that has been well worth it. So start this week, knowing that you are loved, and that starts with you.

‘Ok, now I’m about to go to the gym. Serena.’

This comes after the athlete welcomed her second daughter with husband Alexis Ohanian in August.

She shared a sweet clip of herself, husband and daughter Olympia, five, with the newborn 𝚋𝚊𝚋𝚢 named Adira River Ohanian.

The caption read: ‘Welcome my beautiful angel.’

In the video Serena is seen looking pretty in a pink dress in honor of her new daughter as she walks over to Alexis and kisses him.

Olympia, also in pink, walks over to join her parents, who kiss her, before Serena indicates she has forgotten something.

The star then walks back into frame cradling the couple’s newborn daughter as the family celebrate their second child.

Revealing the 𝚋𝚊𝚋𝚢’s adorable name on Instagram, Alexis wrote: ‘Welcome, Adira River Ohanian.

‘I’m grateful to report our house is teaming with love: a happy & healthy newborn girl and happy & healthy mama.