Cristiano Ronaldo walked off the field for what looks to be the last time in a World Cup shirt, and it was Spain's bench, not its long-celebrated passing game, that closed the door on him. Mikel Merino, on the pitch for barely six minutes, ran onto a Ferran Torres pass and finished past Diogo Costa in the first minute of second-half stoppage time, lifting Spain past Portugal 1-0 in the Round of 16. Spain now moves into a quarterfinal against the winner of the United States-Belgium tie.