On Monday, Aug. 17, Serena Williams made her first Cincinnati Open appearance in four years alongside her sister, Venus, in a doubles match. The Williams sisters lost to local tennis product Peyton Stearns and Marta Kostyuk in women's doubles on Aug. 17 at the Cincinnati Open. 🎥: Shelby Dermer, Cara Owsley #tennis #wtatennis #serenawilliams #venuswilliams #cincinnati