Everton have reportedly opened talks with Tottenham over the possibility of renegotiating the deal that saw the 27-year-old move to Goodison Park last January.
The Toffees agreed to a complex transfer that included several performance related clauses which could have seen the deal rise as high as £30million.
However, in a dire financial situation and with the threat of a 12-point penalty over alleged FFP breaches looming, the club have sought to restructure terms.
Spurs are in line to receive £10m from the Merseyside club when Alli makes his 20th appearance.