Robin van Persie did not train with the Netherlands on Tuesday due to a stomach bug and his status for the semifinals against Argentina is in doubt.
"He had some stomach problems, some intestinal problems, so it’s better not to train then because you make it worse," said Louis van Gaal, who is likely to switch back to the 5-3-2 shape he favored against Spain and Chile.
"Van Persie is our captain. So in that capacity alone he is very important. In principle my captain will always play but they have to be in good shape."