Roma goalkeeper Maarten Stekelenburg says he doesn't know whether he will play for Holland over the next 10 days.
The shot-stopper has been included in the squad for the Euro 2012 qualifiers against Moldova and Sweden, but he has yet to prove his fitness.
The summer signing from Ajax has not played a competitive game since he was knocked unconscious in the 0-0 draw with Inter on September 17.
"Nobody wants to take the risk, the doctors don't and neither do I," the No 1 told Sport-Promotion.
"Today I'm in the Netherlands and we will decide later this week whether I can play for Holland or not.
"I had a slight reaction after training on Thursday. We had a tough session and I got a headache. Not a severe one, but still.
"Friday was the same, I had a heavy head, so to speak."