The Sunday Express says sources close to the Spanish giants claim that Bale's £90m transfer has not gone through yet because Spurs chief Daniel Levy is insisting Real fork out an EXTRA £10m if the star is sold to another Premier League club within four years.
Levy is also believed to be unwilling to do the deal until today's derby with Arsenal is over.
As it stands, Spurs will bank a world-record £90m for Bale.
Add another £54m that the player is understood to be earning from a five-year contract and the bill rises close to that £150m mark.
But if Levy gets the £10m add-on clause he wants, it will soar well over £150m should the Welshman return to the Premier League for any reason before his contract expires.
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