SAO PAULO — U.S. World Cup coach Jurgen Klinsmann boarded the team’s flight to Manaus on Friday with a big decision to mull over: What is the best way to replace Jozy Altidore for Sunday’s match against Portugal?

Altidore, the big, physical forward who draws defenders and opens space for teammates, strained his left hamstring early in the opening 2-1 victory over Ghana. He is unavailable for Sunday’s match, and there is no striker on the roster with a similar build or style, so Klinsmann has to change the look of his attack.

He can go with speedy Aron “Ice Man” Johannsson, the Kevin Bacon lookalike. Klinsmann turned to Johansson when Altidore went down Monday night, and though he had trouble getting anything going against Ghana’s physical defenders, he might have more luck against a depleted Portugal back line that will be missing the suspended Pepe and injured Fabio Coentrao.

Johannsson scored 21 goals for AZ Alkmaar in the Dutch league and can be deadly in the box, which is why the Icelandic Soccer Federation was so upset that Johannsson, a dual citizen, chose to represent the United States when Klinsmann called on him last year.

Another option to replace Altidore up front is the opportunistic Chris “Wondo” Wondolowski, the San Jose Earthquakes fan favorite who is part Native American and whose tribal name means “warrior coming over the hill.” He is not the biggest, quickest or most skilled forward of the U.S. bunch, but he can hold the ball well and has an uncanny ability to be in the right place at the right time and find the back of the net.

Wondolowski led Major League Soccer with 27 goals in 32 games in 2012 and was named league MVP.

He also led MLS in scoring in 2010, with 18 goals in 28 games. He has scored nine goals for the United States since last year, including a hat trick in a Gold Cup match against Belize. Not bad for a guy who was overlooked by Division I college programs, wound up playing at Division II Chico State (California) and was taken 41st in the 2005 MLS Draft.