She's the number one seeded player in Women's tennis, and has a plethora of trophies and grand slams under her belt.
So it was little surprise to see Serena Williams showcasing her super fit body as she worked up a sweat during a run in Coral Gables, Florida on Monday.
And while the sporting star is famed for her athletic prowess, the 34-year-old was actually hard at work shooting a television commercial as opposed to training for a tournament.