Defending women's champion Serena Williams serves 10 aces but continues to exhibit an uncertain backhand on her way to dispatching Russian Maria Kirilenko. Williams next faces ninth-seeded Marion Bartoli of France.Serena Williams served 10 aces, howled "Come on!" at least a dozen times and did a four-corners wave Saturday after she moved into the fourth round of Wimbledon with a 6-3, 6-2 win over Russian Maria Kirilenko.