Isco has endured a difficult season at Real Madrid
Isco's contract expires at Real Madrid next summer.
He has struggled for game time under Zinedine Zidane this season, making just 13 La Liga appearances.
Reports in Spain have suggested the playmaker is on Barcelona's radar.
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Isco has been linked with a move to Barcelona
The Catalan giants have been backed to make a summer move for the Spain international, who is reportedly on a shortlist to replace Andres Iniesta.
As well as Barcelona, Manchester City have also been touted as a potential destination.
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But Isco has hit out at talk he could join Madrid's fiercest rivals, accusing them of "inventing stories."
"Players are aware of rumours," he told Spanish newspaper Marca.
Isco scored as Spain beat Israel 4-1 last night
"We are used to it, now that there is less football during the break some people have to invent stories."
Isco was on target as Spain thumped Israel 4-1 last night.
City star David Silva, Sevilla's Vitolo and Chelsea's Diego Costa also got on the scoresheet.