Top-seeded Russian Anastasia Pavlyuchenkova and fourth seed Vania King were first-round winners Tuesday at the $220,000 Citi Open tennis event.

Pavlyuchenkova beat Serbian Bojana Jovanovski 6-4, 6-3, while King advanced with a 6-3, 6-4 triumph over fellow American Jennifer Elie on the hardcourts at the William H.G. FitzGerald Tennis Center.

The second round also got underway, with third-seeded American Sloane Stephens and Chinese Taipei's Kai-Chen Chang securing spots in the quarterfinals.

Stephens battled past Portugal's Michelle Larcher de Brito 6-2, 0-6, 6-1 and Chang cruised to a 7-5, 6-4 victory over Sweden's Johanna Larsson.

The 2012 D.C. champion will collect $37,000.