Stoke are sweating on Premier League approval on their last-gasp bid to sign Michael Owen after the striker finally agreed to join them.
Press Association Sport understands the Potters will not learn whether the move will be ratified by the Premier League board until Wednesday.
It is unclear whether Stoke had provided the relevant documents for the signature of free agent Owen before or after the 4pm deadline for clubs to submitted their 25-man squad lists.
The uncertainty means the Premier League were only able to release details of those lists for 19 of their 20 clubs, with the Potters' still pending.
It is understood Stoke would otherwise be prevented from filling Owen's spot with another player if his move was rejected.
Clubs are able to sign free agents outside the transfer window but are only able to field them in the Premier League if they have previously registered fewer than 25 players.
The Premier League said in a statement: "The Premier League board is currently considering an application from Stoke City to register a player and, subsequently, their squad list will be confirmed at a later date."