Canada’s round-of-16 date with Morocco in Houston is the kind of game that can rewire a country’s sporting identity. The 30th-ranked Canadians are facing the sixth-ranked Atlas Lions for a place in the World Cup quarterfinals, and even Wayne Gretzky admits he asked Jesse Marsch the question on every fan’s mind: “Do we have a chance?” The answer is uncomfortable but not impossible. Morocco arrived unbeaten after drawing 1-1 with Brazil, beating Scotland 1-0,...