Paris Saint-Germain have reportedly been left in a position where they would have to accept offers of £145m for Neymar in 2020.
The French giants paid a world-record fee in order to sign the forward from Barcelona in 2017, but speculation has persisted over the Brazilian's next move.
PSG would likely want to recoup close to the £198m which they paid two years ago if they sold Neymar this summer, but it appears that any interested clubs may have room to negotiate a lower deal.
According to Mundo Deportivo, the 27-year-old has a 'secret release clause' in his contract which allows a transfer for £145m at the end of the 2019-20 campaign.
Neymar is allegedly keen on a return to Spain at some stage in his career, with Real Madrid said to hold an interest in pushing through a big-money deal.
