Recent U.S. Open champions Aryna Sabalenka, Iga Swiatek and Coco Gauff lead the women's field when singles play begins Sunday at Flushing Meadows.

Coco Gauff fires her coach ahead of the US Open, raising concerns about her form and potential. Despite past successes, her struggle with serves continues.

Matthew Daly is out and Gavin MacMillan is in to correct Coco's spate of double faults that has put her in a deep tailspin since winning the French Open.

US tennis star Sloane Stephens has suffered a spectacular WTA world rankings slide out of the top 900 singles players eight years on from her US Open Grand Slam win ...