Caroline Wozniacki eliminated eighth-seeded American Madison Keys 6-3, 6-4 Sunday to reach the US Open quarterfinals, her deepest run at a Grand Slam tournament in two years.
Maria Sharapova reached the US Open's fourth round by taking five of the last six games after her opponent, Sabine Lisicki, was warned by the chair umpire about receiving coaching help.
Caroline Wozniacki overpowered second-seeded Roberta Vinci 6-1, 6-1 Sunday to win the Istanbul Cup final and clinch her first WTA title of the year and 22nd overall.
