Real Sociedad have confirmed their interest in taking Jo on loan from Manchester City.
The Basque club have been linked with a move for the striker, who City are seemingly keen to offload having loaned him out for the last two seasons to Everton and Galatasaray respectively.
He has reportedly already been offered to Valencia this summer as well as Sociedad, who are keen to take him.
Their president Jokin Aperribay wants to land the tall forward but concedes it is not a straightforward deal.
"It is very, very difficult," Aperribay said.
"He is a great player, but he belongs to Manchester City and we have talked by fax.
"In other words, it is much less than what has been said in the press."
Reports have also suggested that as part of a possible deal, City have asked for first option on Sociedad's highly-rated French youth international winger Antoine Griezmann.