With a place in the semi-finals on the line Thursday at ATP Cup, Daniil Medvedev and Roman Safiullin stepped up, overcoming Matteo Berrettini and Jannik Sinner 7-5, 4-6, 10-5 to fire Russia to a 2-1 victory over Italy in Group B in Sydney.
The reigning champion will play the winner of Group C in the semi-finals on Saturday.