“As the summer of Louis van Gaal turns into the season of Louis van Gaal, the Dutch manager seems set to put a tactical stamp on the Premier League, bringing the three–center back system he used at the World Cup to Manchester United. And it’s a harbinger of things to come; outside of England, the back three (or five) has been making a comeback. Here’s what’s behind van Gaal’s — and a handful of other coaches’ — thinking.” Grantland