Britons Sonay Kartal and Katie Boulter crash out of US Open in first round

Kartal endures cramps in 6-3, 1-6, 6-1 loss to Haddad MaiaKostyuk beats Boulter 6-4, 6-4, Swiatek and Sinner winSonay Kartal vowed to come back stronger after her 6-3, 1-6, 6-1 defeat by the 18th seed Beatriz Haddad Maia in the first round of the US Open after struggling with excruciating full-body cramps in warm conditions on Tuesday afternoon in New York.For much of her maindraw debut at the US Open, Kartal battled admirably, showing her problemsolving abilities by recovering from a tough open...