Vandeweghe charges in quarters

ROSEMALEN, Netherlands — Top seed CoCo Vandeweghe marched into the Libema Open quarterfinals with a 7-6(4) 6-3 win over Arantxa Rus in the second round Wednesday.

American Vandeweghe, a quarterfinalist at Wimbledon last year, is on course to win her third title at Hertogenbosch after a commanding performance during which she hit 26 winners, including 11 aces, to dismantle Rus's challenge in a little over 90 minutes.

World No. 16 Vandeweghe will take on the winner of the match between American Alison Riske or Hungarian qualifier Fanny Stollar in the last eight.

Russian Veronika Kudermetova, who stunned defending champion Anett Kontaveit in the first round, reached her first WTA quarterfinal after ousting Switzerland's Belinda Bencic 6-2, 2-6, 6-3.

The 21-year-old will face Serbian Aleksandra Krunic in the last eight after the seventh seed eased to a 7-5, 6-2 win over Bibiane Schoofs of the Netherlands.

Defending champion Gilles Muller fell to a shock 6-3, 7-5 defeat by Australian qualifier Matthew Ebden.

World No. 69 Ebden progressed to his second ATP World Tour quarter-finals and will face Romanian Marius Copil, who secured a 7-5, 4-6, 6-4 win over Japanese seventh-seed Yuichi Sugita.

Tomic, ranked 181st in the world, will face fourth-seed Fernando Verdasco in the next stage after the Spaniard ousted Russian Daniil Medvedev 6-4, 6-1.

Sharapova, Keys withdraw

Maria Sharapova and Madison Keys have withdrawn from next week's Nature Valley Classic in Birmingham as they look to regain full fitness ahead of Wimbledon.

Sharapova, the 2004 Wimbledon champion, said she needed rest after reaching the French Open quarterfinals.

American Keys, 23, will miss the Birmingham event due to an abdominal injury. — Agencies