West Ham United have an agreement with Leeds United which means they cannot disclose the amount of Crysencio Summerville’s release clause, according to ExWHUemployee.
The Hammers have now completed the capture of the Dutch winger from the Championship club.
Summerville had a clause in his contract which West Ham were able to trigger to take him from Elland Road.
It has been suggested in some quarters that the fee is around £25m, but that has not been confirmed and the exact amount remains unclear.