KANSAS CITY, Missouri, July 8 : Not even the most pessimistic Argentina fan would have predicted the defending champions would need extra time against Cape Verde and a stunning late comeback against Egypt after cruising through the World Cup group stage with near-perfect authority.But after two difficult knockout matches, Lionel Scaloni's side remain alive and are already turning their attention to Saturday's quarter-final against Switzerland in Kansas City.The dramatic 3-2 win over Egypt in Atlanta on Tuesday may be remembered as a defining moment if Argentina complete their title defence, with Lionel Messi inspiring a remarkable comeback as they recovered from 2-0 down with 11 minutes remaining."It's very difficult to assess this team. The real assessment is the heart they showed, the de