Christian Pulisic trained apart from his U.S. teammates on Wednesday for the third straight day because of his calf injury, increasing concerns about his availability to face Australia on Friday in the Americans' second game of the World Cup. Pulisic played a dynamic first half in the Americans' 4-1 victory over Paraguay last week, but came off at halftime after feeling stiffness from a calf injury incurred in training. “We’re really hoping that Christian is going to be back for the game, of course,” said Brenden Aaronson, one of Pulisic’s potential replacements.