Ricky van Wolfswinkel will be out of action 'for a long time' as he undergoes treatment on a brain aneurysm discovered after a severe concussion in Champions League qualifying.
The Basel striker took a heavy blow to the head late in the first leg of his side's 5-2 aggregate defeat to LASK.
Van Wolfswinkel, who has won two Netherlands caps and featured regularly at youth level, was diagnosed with a concussion but sent to hospital for further testing.
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Doctors uncovered an aneurysm that otherwise would have gone undetected and the forward will now take time out from football to have treatment.