Brentford's attempt to sign a highly rated young striker is said to be in serious jeopardy.
The Bees were making a move for Club Brugge winger Antonio Nusa this winter.
However, The Standard states that the deal has been thrown into doubt due to a failed medical.
The Bees agreed a 31.5 million fee with Brugge, but are backing out due to concerns about Nusa's fitness.
They are now seeking more medical information from Club Brugge and the Norwegian Football Federation.
Tottenham were the other side chasing Nusa, but were pipped to a deal by Brentford.