Serena Williams and her daughter Olympia’s adorable matching mother-daughter moments. The 40-year-old tennis star and her 4-year-old daughter wore matching pink outfits in the latest set of photos for Serena’s Instagram, which boasts more than 14.5 million followers.“Hey @olympiaohanian, remember that time when we were in Paris? And we slayyyyyyeddddd,” the tennis star wrote in her caption on Monday, April 4.