midfield, equalised by a curling the ball into the net with a strike of no small quality in the 64th minute.
Whether or not he has a debilitating knee injury, Ronaldo, as he had in the 4-0 defeat by Germany with which Portugal opened their campaign, looked distinctly out of sorts until his decisive contribution at the end.
The 2-2 draw means the Americans need only a point from their final match against Germany to guarantee their progress from one of the toughest groups at the World Cup.
"The US are known to give everything in every single game," said Klinsmann.
"We have that fighting spirit and determination to try to win every game and therefore we will go for a win against Germany."
Portugal find themselves with their destiny out of their own hands as they prepare for their final group match against Ghana.
Coach Paolo Bento was left bemoaning the impact on his squad of so many having played for European clubs competing for silverware.
"Many of the players had a very short break before the World Cup and we have hence had many injuries during the tournament," he said. "This will of course limit our options."