Germany and Italy bounced back from opening defeats with victories at the ATP Cup in Sydney on Tuesday while defending champions Russia made it two wins out of two ties. Alexander Zverev and Jan-Lennart Struff won their singles rubbers to help Germany beat the United States 2-1 while Italians Matteo Berrettini and Jannik Sinner crushed France 3-0 before Russians Daniil Medvedev and Roman Safiullin downed hosts Australia with the same scoreline. Coming off a 2-1 defeat against Britain, Struff put Germany ahead when he survived 34 aces from John Isner to win 7-6 (9-7), 4-6, 7-5. World number thr…