It all depends if he joins some other club, or signs a new contract (don't see the second happening). Then it depends if we are in a fight with Spurs (be it for title, top 4 or relegation). If we are, cannot see Spurs strengthening us, if not, maybe 35m should do it.How much are we going to pay for him in January? Maybe Jose should thank Levi for saving the club some money.
Next summer is 25m if Spurs exercise the +1 year clause, or 0 if they don't. They obviously will unless he gets a career-threatening injury, or they forget to play him for 10% of the available matches.