Caroline Wozniacki defeated Maria Sharapova at the US Open, Flushing Meadows. The Dane, seeded 11th, won 6-4, 2-6, 6-2. Wozniacki, 24, is through to her first Grand Slam quarter-final since 2012, and plays Italy’s Sara Errani next. “It means so much to me, it’s been a bit up and down for me this year,” said…