Christian Pulisic scored while crashing headfirst into the goalkeeper late in the 38th minute and the United States advanced to the knockout rounds of the World Cup with a 1-0 win over Iran. Pulisic sprawled on the field and was replaced at the start of the second half. The U.S. Soccer Federation said after the game the American star was taken to a hospital for an abdominal scan. The Americans play the Netherlands on Saturday with the chance to reach the quarterfinals for the first time since 2002. Iran has failed to advance in all six of its World Cup appearances.