Tuesday I got a very nice game as an assistant referee during a match of the Dutch u15 National Team against Sparta Rotterdam. A friend of mine was referee during this friendly and he asked me to be one of his assistants. It’s was also nice to have my first game in a football stadium. It’s just the idea, in the end it was a game like any other. One to be focused on and try be as sharp as possible when making your calls. The most important lesson I learned was to stay focused to the second-last opponent all the time. I’m used to do that, but still made…