The American’s girlfriend shared her first experience at a Kansas City football game—including a skybox meeting with the pop megastar and tight end Travis Kelce.

Williams' husband, Alexis Ohanian, and 7-year-old daughter, Olympia, also attended, and got into the spirit by accessorizing with matching T-shirts.

The US Open winner joins a brand roster that also includes Serena Williams, weeks after her viral moment in one of the luxury watchmaker's pieces.