Like millions of other football fans around the world, Nick Montgomery watched in admiration as Borussia Dortmund’s yellow wall repelled everything PSG could throw at them in Paris on Tuesday night. The positional discipline and teamwork of Edin Terzic’s side was a thing of beauty, to anyone with an interest in tactics and tacticians. Beyond the X-and-O jottings of Terzic’s masterplan, however, something else stood out in the first of this week’s Champions League semi-final, second leg fixtures.... Read this story