Feyenoord will be without key centre-back Gernot Trauner for months after the defender suffered a knee injury.
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The Austrian has been a key player for the Rotterdammers this summer but he has had to undergo knee surgery.
The expectation is that Trauner will now miss months of action, which will be a blow for Arne Slot with Feyenoord battling for the Eredivisie title.
Feyenoord may now enter the transfer market with some reports linking them with FC Twente defender Mees Hilgers.
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