Alexandr Dolgopolov won his first title in more than 4 1/2 years on Sunday when he stunned top-seeded Kei Nishikori of Japan in straight sets in the Argentina Open final at Buenos Aires.
Dolgopolov recorded a 7-6 (4), 6-4 victory over Nishikori on the clay court to continue his week-long pattern of not losing a single set.