In the late 1990s, when Uruguayan midfielder Gus Poyet left Spanish football to join Chelsea, he was given some advice.
"I had a teammate at Zaragoza who had spent four or five years in England, and he told me all the things that I shouldn't do," he said.
"'Don't dive in the area, trying to get a penalty, don't score a goal with your hand, don't try to cheat the ref, don't try to pressure him to give a yellow card to an opponent.'
"At that moment I wondered where I was going. I thought I was on...