In 2011 footballer Xabi Alonso gave an interview to the Guardian on his experiences as a young player moving from Spain to Liverpool. He describes the most significant difference here.
I don't think tackling is a quality," he says. "It is a recurso, something you have to resort to, not a characteristic of your game. At Liverpool I used to read the matchday programme and you'd read an interview with a lad from the youth team. They'd ask: age, heroes, strong points, etc. He'd reply: 'Shooting and tackling'. I can't get into my head that football development would educate tackling as a quality, something to learn, to teach, a characteristic of your play...
a small autonomous underwater vehicle to cross the atlantic from NJ to spain. Classes can follow along. Right now you can send a message to be carried by the robot