Pro tennis: U.S. Open champion Marin Cilic played two terrific tiebreakers to edge 13th-seeded Sam Querrey, 7-6 (2), 7-6 (3), and reach the Citi Open quarterfinals in Washington. Next for Cilic is matchup with 18-year-old Alexander Zverev of Germany, the youngest quarterfinalist in the nation's capital since Andy Roddick was 17 in 2000. Zverev got past 2012 Citi Open champion Alexandr Dolgopolov, 2-6, 6-2, 6-4. Kei Nishikori moved into his 11th ATP quarterfinal of the season by beating 16th-seeded Leonardo Mayer of Argentina, 6-4, 6-4. Nishikori will face Sam Groth for a berth in the semifinals. Groth delivered 20 aces in a 6-3, 6-4 victory over seventh-seeded Feliciano Lopez. In women's play, Anastasia Pavlyuchenkova of Russia eliminated third-seeded Belinda Bencic of Switzerland, 6-2, 6-4, to reach the quarterfinals The 40th-ranked Pavlyuchenkova, the runner-up at the hard-court tuneup for the U.S. Open in 2012, now meets Christina McHale, who edged Yulia Putintseva of Kazakhstan, 6-2, 1-6, 7-5. Top-seeded Ekaterina Makarova of Russia beat Naomi Broady of Britain, 6-4, 7-6 (2).