Why is retaining the World Cup so hard? Messi’s Argentina out to buck trend

Argentina are out to make history this summer and become the first nation to retain the World Cup on a different continent. No team has done it anywhere since Brazil in 1962. Achieving it would cap Lionel Messi’s career. But how realistic is winning it again?

"I hope that Argentina can still do it," former captain Javier Zanetti tells Sky Sports. "Argentina arrive in this World Cup prepared with a good mentality and a good team," he adds. Then comes the inevitable note of caution. "But it is very difficult to repeat it."