he reportedly does have a clause but their young stars, Neymar and Ganso more precisely, are not looking to leave Santos at any cost, at least for now, as they want to try winning the CWC vs Barca.
I wouldn't be surprised one bit if they both stay and leave only in Jan ... should one of them leave, I'd think the other would follow suit as their chances of beating Barca would get even smaller than they are now.