 The Italian Genic Sina surrendered the opening sets but battled back to seal a 3-6-6-4-6-1-6-2 victory over American Brandon Nakashima at the US Open. Sina, seated 11th and 56th place above Nakashima in the World Rankings, dropped his serve in the sixth game of the opening set to fall behind but came back strongly with two service breaks in each of the next three sets to complete his win in the early hours of Sunday morning after just over three hours of play. Arenas Balinka of Belarus, the former World No. 2 and semi-finalist at Floshing Meadows last year, demolished Qualifier Clara Borrell 6-0-6-2 in just 68 minutes, hitting 27 winners past the 21-year-old from France. So Balinka will next face American Daniel Collins, who amped 52 winners past experience Aliza Connett or France in a 6-4-7-6-9 victory to book a sport in the fourth round of the US Open for the first time.