What to know

• NEW YORK— Carlos Alcaraz is ready to return from injury to defend his U.S. Open title. “Here we go,” Alcaraz posted on his social media pages Thursday, with one picture showing him in front of the U.S. Open logo. The seven-time Grand Slam champion has been sid...S1
• World number one Jannik Sinner confirmed on Friday he will not compete in the US Open because of a right knee injury.S2
• He had missed the French Open, ‌Wimbledon and the North American hard-court events in Toronto and CincinnatiS3