Carlos Alcaraz has not played a singles match since 13 April at the Barcelona Open [Getty Images]Carlos Alcaraz will start his US Open title defence against Russia's Roman Safiullin in the first serious examination of his fitness following a long-term wrist injury. Second seed Alcaraz, who won the men's title in New York last year, has not played a competitive singles match for more than four months because of inflammation in his playing right wrist.Despite his lack of action, the 23-year-old Sp