Real Madrid winger Angel di Maria could be out of the World Cup for Argentina.
Di Maria collapsed clutching the back of his thigh after a shot in the 1-0 quarter-final victory over Belgium.
He tried to carry on for a few minutes, but went down again and hobbled off the field.
More tests are needed, but there are reports in Argentina that Di Maria has suffered a thigh or hamstring strain.
For the big stories and the banter follow us on Twitter: @tribalfootball