The transfer of Martin Braithwaite to Barcelona from Leganes has been contentious for a number of reasons.
It has occurred outside of the usual transfer window periods, with the January cut-off deadline having passed on January 31.
As well as that, the nature of the deal has upset Leganes, who have complained to the Spanish football authorities that it leaves them at an unfair disadvantage.
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So, why are Barcelona allowed to sign the Denmark striker at all? Goal has the details.