Fulham have finalised the signing of teenage midfielder Jack Grimmer from Aberdeen on a three-and-a-half year contract.
Sky Sports revealed on Tuesday that Grimmer was set to finalise a move to Craven Cottage after travelling to London to hold talks over a deal.
Grimmer, whose Aberdeen contract was due to expire at the end of the season, rejected the opportunity to stay at Pittodrie.
The SPL club will be entitled to compensation, but Dons boss Craig Brown fears it could amount to as little as £200,000 and he is concerned for the future of Scottish football.
Brown said: "What Fulham would end up paying would never make up for the time, effort and money Aberdeen have put into coaching and developing Jack.
"The future of youth development at every Scottish club is under threat if teams in England can just come up and take away our best youngsters for next to nothing. It is something the SFA and SPL need to address urgently."
Grimmer became the youngest player in Aberdeen's history when he made his debut against Rangers in April 2010.
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