Follow live | ATP, WTA 3rd round results at the 2026 Cincinnati Open

The 2026 Cincinnati Open at Lindner Family Tennis Center in Mason progressed to the Round of 32 on Monday, August 17, 2026, with ATP and WTA third-round singles matches taking place. A major highlight of the day was the return of Serena Williams, who drew significant attention to the doubles draw. Live updates were provided by The Cincinnati Enquirer throughout the day.