Real Zaragoza are due a bumper windfall from Athletic Bilbao's sale of Ander Herrera to Manchester United.
The youngster could sign for United today in a €36 million deal.
Former club Real Zaragoza is due 4 per cent of any sell-on fee - which equates to a cool €1.45 million.
Herrera left Real for Bilbao three years ago for €12.7 million.
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