A relentless Russia won the ATP Cup Sunday, crushing Italy 2-0 with Daniil Medvedev and Andrey Rublev in red-hot form leading into the Australian Open. World number eight Rublev destroyed Fabio Fognini 6-1, 6-2 in just 61 minutes before fourth-ranked Medvedev swept past Matteo Berrettini 6-4, 6-2 to be crowned champions of the 12-nation team event in Melbourne. mp/dh