So after week 2 of 5 there are five teams with 5 to 1 victories occupying the qualification berths now: USA, Serbia, Brazil, Turkey and Netherlands would attend hosts China in Nanjing in finals, if they can hold them. Main contenders are now Russia and South Korea with 4 to 2 victories each so far.
You can forget about South Korea. KYK, Yang Hyo-Jin and Kim Su-Ji will not be playing in week 3 & 5. The defeat to Belgium and Italy might have cost them the chance at making the finals.