Substitutes Aritz Aduriz and Thiago Alcantara similarly lacked composure close to goal .
Silva curled a left - foot shot wide from 18 yards when it seemed perfectly set up for him to score the winner .
Substitutes Aritz Aduriz and Thiago Alcantara similarly lacked composure close to goal , while Silva curled a left - foot shot wide from 18 yards when it seemed perfectly set up for him to score the winner .