West Ham midfielder Pablo Fornals' move to Real Betis remains in the balance.
The Spaniard's deal was yet to be rubberstamped as the transfer deadline fell last night.
A computer problem at West Ham when processing the operation has left the player's transfer up in the air, although Betis are optimistic and hope it can be resolved.
In statements to 101 TV, Ramón Alarcón, CEO of the Verdiblanco club, said: "There is a last minute incident with Fornals that we believe is a computer incident that we have been working on to be able to fix it.
"Betis gave all the documents in a timely manner and West Ham seems to have had a problem in their computer tool, not only in the case of Betis but in others, and we hope that it will be resolved in the next few days, tomorrow or the day after.
"The contract is done in a timely manner, the substance of the matter is done, we understand that it is a computer error and we believe it will be resolved. We are optimistic, but cautious."