Britain’s Harriet Dart raced into the second round last night, but qualifier Jan Choinski ran out of steam in a five-set thriller on his New York main-draw debut. Dart claimed an assured 6-1, 6-2 victory against Chloe Paquet of France. Choinski, who won three qualifying matches to reach the main draw, lost 6-2, 6-3, 5-7, 6-7, 6-3 to Spain’s Roberto Carballes Baena.