Defending champion Argentina trailed Egypt 2-2 at the second half in the round of 16 of the World Cup on Tuesday.Yasser Ibrahim and Mostafa Zico scored to give Egypt a surprise lead at Mercedes-Benz Stadium, and Lionel Messi missed the chance to level the match when his penalty was saved by goalkeeper Mostafa Shobeir.Cristian Romero and Lionel Messi scored Argentina's goals. That’s two goals in four minutes.Argentina is bidding to become the first back-to-back World Cup champion since Brazil in 1958 and '62.The three-time champions were given a scare by Cape Verde in the last round, needing extra time to win 3-2.Egypt has already made history by advancing to the round of 16 for the first time, having failed to get beyond the group stage on its four previous appearances.