Manchester City and Real Madrid are reported to be leading the race to snap up the 21-year-old, who has a £30m release clause in his current contract.
The playmaker has been heavily linked with a switch to the Citizens after his former Malaga manager Manuel Pellegrini was appointed as Roberto Mancini’s successor at City.
“I prefer not to comment about my future, but the matter could be closed this Sunday,” Isco said.
Last week, Isco revealed he hasn’t spoken to his former mentor Pellegrini about a potential move to the Eastlands outfit.
“No I haven’t spoken to him,” Isco told AS English.
“I found out that he would be joining City on the internet at the time but he hasn’t phoned me.
“He is a great coach and I hope that it all works out for him in England. He is a fabulous coach – one who did a fantastic job at Málaga – just like he did for his previous clubs so I am sure he will do an equally good job over there.”
Isco scored nine goals and made one assists in 37 La Liga appearances last season.
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