Russia, Australia, Serbia, Britain into ATP Cup quarters

SYDNEY (AP) - Daniil Medvedev helped Russia to a 3-0 sweep of its pool matches to join Australia, Serbia and Britain in the quarterfinals of the inaugural ATP Cup on Tuesday.

Medvedev clinched victory against Norway by beating Casper Ruud 6-3, 7-6 (6) in Perth. Karen Khachanov had already routed ...