The proposition that, according to Spanish daily 'AS', the goalkeeper finds most appealing is the one made by Liverpool. The Reds will make a return to the Champions League, a key factor for the former Madrid man, and talks to bring the highly decorated Spaniard to Anfield have begun.
There is even talk of a preliminary agreement between the club and the player, which would see Casillas join the third club of his career, in one of his best moments in recent times.
It is not the only offer he has to consider. Many minor leagues would love to sign the keeper, who would be a great addition both on and off the pitch, as a marketing strategy.
Turkey or Qatar have set their sights on Casillas who, by the looks of things, will return to one of Europe's top leagues if, finally, he joins Klopp's side.