No more child's play for King, Shvedova

   There's no more kidding around for Vania King and Yaroslava Shvedova. Now it's time to face the big girls.
   King and Shvedova, the third seeds and defending champions, dismissed American wild cards Jessica Pegula and Taylor Townsend 6-4, 6-2 Monday in the third round of women's doubles at the U.S. Open in Flushing Meadows, N.Y. Pegula is 17 and Townsend 15.
   King, an American who plays for the Sacramento Capitals of World TeamTennis, and Shvedova, from Kazakhstan, will meet Czechs Andrea Hlavackova and Lucie Hradecka, the eighth seeds and reigning French Open champions, Wednesday in the quarterfinals.
   The winner will face either Kveta Peschke and Katarina Srebotnik, the top seeds and reigning Wimbledon champions, or fifth-seeded Maria Kirilenko and Nadia Petrova in the semifinals.
   Meanwhile, Americans John Isner and Donald Young, both of whom have won tournaments in the Sacramento area, face stiff challenges at 8 a.m. PDT Tuesday (ESPN2) as they seek their first Grand Slam quarterfinal berths.
   The 28th-seeded Isner, who won a $15,000 tournament in Shingle Springs in 2007 in his professional debut, will meet France's Gilles Simon, the 12th seed who knocked off 2009 U.S. Open champion Juan Martin del Potro in the third round, in Louis Armstrong Stadium. Isner and Simon have never played each other.
   The unseeded Young, who won the $50,000 Sacramento Challenger in 2008, will take on Great Britain's Andy Murray, the fourth seed and 2008 U.S. Open runner-up, in Arthur Ashe Stadium. Young beat Murray 7-6 (4), 6-3 in the first round at Indian Wells in March in their only career meeting.
   In the first round of junior girls singles Monday, Stanford sophomore Nicole Gibbs pounded Patricia Iveth Ku Flores of Peru 6-1, 6-1.