Jozy Altidore was hurt during the USMNT game against Ghana on Monday night.
Around the 21st minute, Altidore came to a halt while appearing to hold his hamstring.
Aron Jóhannsson came in as a substitution.
Later, the U.S. team reported that Altidore has a strained left hamstring. Coach Jurgen Klinsmann said at the end of the game that he hasn’t gotten an injury update regarding Altidore yet, while Jeremy Schaap of ESPN reported that the striker will undergo tests in Sao Paulo on Tuesday.
Altidore had two goals during the final World Cup tune-up against Nigeria.
If he’s unable to return to play in the tournament, he cannot be replaced on the roster, according to FIFA regulations.
Several teammates sent and other athletes sent well-wishes to Altidore. “Keep well Jozy! Hate to see that happen,” said LeBron James via Twitter.
“Jozy Altidore, thinking about u bud!” added Stuart Holden.
The United States won 2-1 against Ghana.
See an Associated Press recap below
US emerges bloodied and victorious against Ghana
NATAL, Brazil—After 90 brutal minutes of end-to-end action, the Americans emerged with a thrilling 2-1 win over Ghana.
U.S. fans were screaming for revenge Monday after the Black Stars eliminated the Americans from the last two Cups.
They got it. At a price.
Clint Dempsey scored a shocking goal a half-minute in, but the U.S. couldn’t make it stand up. Andre Ayew tied the score in the 82nd minute after a brilliant back-heel pass from Asamoah Gyan, who had eliminated the U.S. four years ago.
And then, just four minutes later, 20-year-old John Brooks rose to head in Graham Zusi’s corner kick from 8 yards — the first substitute to ever score for theUnited States in 30 World Cup games over 84 years. The defender, an unexpected addition to the American roster, was so overcome he fell to the field and was unable to move even after teammates climbed off the dog pile. He had made his national team debut only last August, and Brooks hadn’t scored in four appearances.
U.S. players ran onto the field to celebrate at the final whistle, jumping as supporters chanted “U-S-A! U-S-A!” Now the Americans are in good position in Group G, where Germany opened with a 4-0 rout of Cristiano Ronaldo and Portugal.
U.S. coach Jurgen Klinsmann had said this would be like a final. Jozy Altidore was hoping it wasn’t his finale.
The forward was carried off on a stretcher after his left hamstring gave out in the 21st minute when he tried to control a long ball. He awaits tests that will determine whether he can return for this World Cup.
Dempsey went down too on a balmy late-autumn night but stayed in the game. The U.S. captain ended the first half with a tissue up his nose to stop the bleeding after John Boye’s kick to his face during a battle for a header in the 31st minute, and he was struggling for breath in the second.
Matt Besler came out at the start of the second half after feeling tightness in his right hamstring. It was his replacement, Brooks, who scored the winning goal. Zusi was also a sub, coming on for the hobbling Alejandro Bedoya in the second half.
By the time of the final whistle, the U.S. lineup had Brooks in central defense and a virtually invisible 23-year-old Aron Johannsson at forward.
Now the odds favor advancement. But that might depend on which players are able to make it on the field for Sunday’s game against Portugal in the hot and humid Amazon rain forest capital of Manaus.