Brush up on your tennis skills, people — you never know when Serena Williams will show up at your local court!
Two random guys were in the middle of a tennis match on Sunday night when the Grand Slam champ herself waltzed up to them and casually challenged them to a game.
According to TMZ, Williams was walking her dogs with her fiancé, Reddit cofounder Alexis Ohanian, in San Francisco’s Mission Dolores Park when she stumbled upon the match and wanted to see how the men would react to her challenge.
The men were absolutely floored when they realized they were in the presence of a tennis legend.
Though she couldn't play for long (she left her Nikes at home), Williams was nice enough to pose for a few pictures.
She also had a lighthearted warning for the rest of her fans watching the exchange on her Snapchat: "The moral of the story is, you never know when I'll be coming to a tennis court near you!"