Serena and her daughter took to the court, sporting similar outfits.
"Look at that precious doubles partner", Serena William's fashion label commented on her post.
She now holds the record for the most Grand Slam titles among active players with a total of 39 across singles, doubles and mixed doubles.
The mother and daughter were, however, wearing different color of sneakers.
Establish to flip three in September, Olympia now has an edge over the competition with her mentor mother a 23-time Grand Slam victor.
Serena shared a series of photos and clips of the pair's fun day, including little Olympia copying her mama's stance and the pair sharing a high five.
Serena Williams and her daughter playing tennis melt hearts
Asking her 12 million Instagram followers caption the snap in the comments, Williams' famous friends and family instead gushed over the adorable moment.
She has one the world's greatest-ever tennis players for a mother, so it's no surprise Serena Williams' daughter Olympia is a natural the court. Former globe variety 1 tennis player from Denmark, Caroline Wozniacki identified as the duo the "cutest detail" whilst National Basketball Association star Dwayne Wade wrote: "If this is just not the cutest thing I've noticed".
Instagram user badassboz commented saying she loves the duo.
"Working and being a mom is not easy", Serena captioned a pic of her holding a sleeping Olympia.
Serena Williams last won the Australian Open where she beat her sister Venus Williams in the final and got a Grand Slam in 2017.
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