I've watched every minute since puck drop of the first pre-tournament game, and I can't understand how the coaching staff hasn't instructed them to challenge the opposing defensemen more when they have the puck at the blueline in Canada's zone. Game after game I see a huge gap between Canada's forwards and opposing defenseman, with Canada's players all stacked in the middle leading to lots of traffic for screens and uncontested shots (see Svozil, Moravec, Sinn, Jansson and Nemec goals). The USA has a lot of offensive talent on the blueline that will exploit this all day if we don't adjust.