US Open roundup: Harriet Dart stuns Daria Kasatkina for career-best win

• Briton beats No 10 seed 7-6 (8), 1-6, 6-3
• No 7 seed Simona Halep is upset by Ukraine's Daria Snigur

Harriet Dart produced one of the biggest wins of her career to reach the second round of the US Open, beating the 10th seed, Daria Kasatkina, 7-6 (8), 1-6, 6-3 in a tough battle in the late afternoon.

As countless long, physical rallies unfurled during their two hours 30 minutes on court, Dart clinched victory by demonstrating her mental fortitude under pressure in the biggest moments.