Unai Simón unzips the washbag he carries everywhere and carefully takes out a piece of paper. It is tiny, but its significance to him is huge. Unfolding it gently, he shows the code in black letters, symbols and numbers which were his instructions from the Euro 2020 quarter-final shootout. In the previous round, his mistake, allowing a 44m back pass to slip under his foot into the net, could have led to Spain being eliminated; four days later, his penalty saves against Switzerland took them to the semi. “A liberation,” he calls it.