Five World Cup knockout storylines

by sportswriters Cao Jianjie and Zhao Yan HOUSTON, June 28 (Xinhua) -- The World Cup knockout stage features two familiar favorites, a record African contingent and a chance for emerging nations to rewrite their football history. Here are five themes to watch as the round of 32 gets underway. 1. Can France and Argentina be stopped? France and Argentina enter the knockout stage as the sides to beat. Argentina won all three matches in Group J and conceded just one goal, with Lionel Messi remaining