Saturday’s World Cup quarterfinal header features three star-studded European giants, and one celebrated underdog that’s trying to become the first African team to reach a semifinal. In the early game, Morocco and its legion of fans will try to upset Cristiano Ronaldo’s Portugal. But will Ronaldo be left on the bench again, after his team’s dazzling performance in a 6-1 rout of Switzerland? The second game is a clash of old rivals and friends. England hopes to make a major tournament semifinal for the third straight time, while France aims to keep its World Cup title defense alive. The winners…