West Ham have been told they must agree a deal for Maxi Gomez today or the Uruguay striker will join Valencia.
Manuel Pellegrini has been in pursuit of 22-year-old Gomez who has a release clause in his contract of £45million.
Celta Vigo have already agreed a deal with Valencia for £13m with 23-year-old Vigo-born striker Santi Mina moving in the opposite direction.
West Ham’s spending power has been boosted by the sale of Marko Arnautovic to SIPG Shanghai for £23m.
But they are still not close to an agreement concerning the structure of the payments.
Celta are putting pressure on the Londoners to make significant progress today or they will go ahead with the Valencia transfer.