Vondroušová reaches US Open quarterfinals

Wimbledon champion Marketa Vondroušová moved a step closer to back-to-back grand slam titles by beating Peyton Stearns to reach the US Open quarter-finals on Monday. The 24-year-old Czech, seeded ninth, broke Stearns seven times and took advantage of her 21 unforced errors in the third set. On Wednesday, Vondroušová will play No.17 Madison Keys, a 6-1, 6-3 winner over No.3 Jessica Pegula.