Carlos Alcaraz claimed his first Cincinnati Masters 1000 title on August 18, 2025, after world No. 1 Jannik Sinner retired due to illness during the first set of their final match. The final lasted only 23 minutes, with Alcaraz leading 5-0 when Sinner, who had been struggling physically, sought medical attention before conceding the match. This victory marked Alcaraz's eighth Masters 1000 title and 22nd career crown overall, earning him a tournament record prize of $1.1 million. The match was their fourth final face-off in three months, with Alcaraz extending his head-to-head lead over Sinner to 9-5. Following the retirement, Alcaraz showed sportsmanship by consoling Sinner and dedicating a message to him. Sinner later withdrew from the upcoming US Open mixed doubles event due to his illness. Meanwhile, Iga Swiatek won her first Cincinnati Open title on the women's side by defeating Jasmine Paolini 7-5, 6-4, reaching her 11th WTA 1000 title and climbing to No. 2 in the WTA rankings. The US Open mixed doubles event, featuring a $1 million prize and a revamped format spotlighting singles stars, began amid mixed reactions from players and fans. Notably, Alcaraz and Emma Raducanu teamed up in mixed doubles but were eliminated in the first round. The doubles title was won by the Italian duo Andrea Vavassori and Sara Errani, who retained their US Open mixed doubles crown after defeating Swiatek and Casper Ruud in the final.