The last two Russians at the US Open, Vera Zvonareva and Anastasia Pavlyuchenkova, have had their campaigns at Flushing Meadows ended. Australia`s Samantha Stosur defeated second seed Vera Zvonareva 6-3, 6-3 in the women`s quarter-finals of the US Open on Thursday. On paper, the ninth-seeded Stosur`s 6-3, 6-3 victory looked like an upset but it was the 2010 French Open finalist`s seventh successive victory over the Russian. Stosur was joined in the last four by three-time US Open winner Serena Williams, who proved too strong for 17th seed Anastasia Pavlyuchenkova. Serena breezed to a 7-5, 6-1 victory, despite hitting just one ace during the game.