Last night’s contentious battle between the Ottawa Senators and Montreal Canadiens had a certain tension to it that only comes with two teams that really don’t like each other. The bad blood was flowing before the puck was even dropped. Yes, it’s true that neither team had anything much to play for but you wouldn’t have known it from the atmosphere at the Canadian Tire Centre. The whole thing made me a certain kind of nostalgic, and got me thinking: who are the Sens’ rivals right now?