Washington Open: Britain's Katie Boulter beats Aleksandra Krunic

British number two Katie Boulter reached the last 16 of the Washington Open by knocking out fifth seed Aleksandra Krunic in straight sets.

The 21-year-old saved a solitary break point as she beat the Serb world number 47 6-2 6-0 in 63 minutes.

Boulter, the world number 118, will face Allie Kiick of the United States in the next round on Wednesday.

Britain's Harriet Dart was 7-5 4-2 down to Switzerland's Belinda Bencic when play was suspended because of rain.

Compatriot Katie Swan is also competing in the tournament and is scheduled to face China's Saisai Zheng on Tuesday.

Russian two-time Grand Slam champion Svetlana Kuznetsova progressed from the first round, beating American Kristie Ahn 6-2 6-1.