Serena and the Duchess of Sussex first met at a Super Bowl party in Miami back in 2010, where they became fast friends. Since then, Serena has attended Meghan's May 2018 wedding and helped organise her New York City baby shower in February 2019. Meghan, in turn, has supported Serena in the Wimbledon finals for the past two years, and Meghan even flew to New York to attend the 2019 US Open final in September, which was her first time travelling solo after having baby Archie in May 2019.
When asked about her friendship with Meghan during a November 2019 interview with Access Hollywood, Serena replied, "She flew all the way with a newborn to see me play in New York and flew all the way back that night, and I probably couldn't have done that. It just kind of goes to show you what an amazing person that she is, and that's just one of the many things that she does for me."