Argentina march on thanks to Messi-oriented tactics. But cracks are starting to show

There’s no debate that Lionel Messi is having the tournament of his life. Aged 39, at likely his final World Cup, he continues to win matches on his own. With 78 minutes on the clock and Argentina 2-0 down against Egypt, they were staring at a round-of-16 exit and a meek defence of their crown. At which point, enter Messi. The captain made the first goal, headed home by Cristian Romero, and then scored the second four minutes later, before Enzo Fernandez headed in the winner in stoppage time — the latest a team has successfully staged a comeback win…