WTA roundup: No. 5 seed Marta Kostyuk rolls in Seoul
No. 5 seed Marta Kostyuk of Ukraine opened the Korea Open with a 6-3, 6-1 win over Arantxa Rus of the Netherlands on Monday in Seoul.,Kostyuk overcameNo. 5 seed Marta Kostyuk of Ukraine opened the Korea Open with a 6-3, 6-1 win over Arantxa Rus of the Netherlands on Monday in Seoul.,Kostyuk overcame