Karen Khachanov (ATP 18) defeated Argentina's Francisco Cherundolo (ATP 22) in two sets 6-2, 6-4 to advance to the ATP Rome 1/8 finals.
Khachanov's next opponent is Chile's Alejandro Tabila (ATP 32), who defeated top-seeded Novak Djokovic in two sets at the Rome tournament.
Tabila defeated Djokovic 6-2, 6-3.