Schalke poacher Klaas-Jan Huntelaar will undergo an operation on an injured knee that could force him out of action for up to four months, according to Sportal.com.au.
The Dutch striker has been sitting on the sidelines since damaging knee ligaments in a 4-0 mauling at the hands of Bundesliga rivals Wolfsburg at the Volkswagen Arena in August.
Schalke boss and former Stuttgart defender Jens Keller expected to see Huntelaar back in training after the international break, but has instead ruled out the Netherlands international until at least 2014.
The 30-year-old revealed on his official Twitter account that he has elected to have a medical procedure to properly amend his knee.
"It's been difficult, but I've decided to undergo surgery," he wrote.
"Recovery time will be three to four months. It's tough, but a necessary step."
It is desperately unfortunate timing for Huntelaar, who had found the net on three occasions in as many matches prior to his season-ending setback.
Keller will also be without Kevin-Prince Boateng, Jermaine Jones and goalkeeper Timo Hildebrand for this weekend's away clash with bottom side Eintracht Braunschwieg.
Ninth-place Schalke currently sit nine points off the pace behind league leaders Bayern Munich with eight fixtures played.
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