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Barcelona president Josep Maria Bartomeu has said he would contact Real Madrid chief Florentino Perez before attempting to sign the unsettled Isco.
The midfielder has fallen from grace at the Santiago Bernabeu, having not started a La Liga game for the club in more than three months.
This has seen a number of clubs express an interest in the player, who has been reduced to a peripheral role at Madrid.
Ahead of Madrid's visit to the Nou Camp in the first leg of the Copa del Rey semi-final, Bartomeu has opened up on how the Catalan giants would go about trying to bring in a player from their long-term rivals.
"If our coaches asked us for a player and they want to leave Madrid, of course we would sign them," Bartomeu told El Partidazo de COPE.
Show all 11 1 /11Barcelona vs Real Madrid combined XI Barcelona vs Real Madrid combined XI Claudio Bravo Barcelona have the best defensive record in the league and the most clean sheets, Bravo has been fantastic in his debut season at the Nou Camp and is excellent with the ball at his feet - a necessity. Iker Casillas is not as bad as some would have you believe, he is a long way from what he once was.
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Barcelona vs Real Madrid combined XI Dani Alves Not able to race up and down the pitch quite as he once was but the Brazilian is still a key outlet for this team and a fiery defender. It'll be very difficult finding a replacement for a very unique player.
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Barcelona vs Real Madrid combined XI Sergio Ramos A great defender, although he can cross the line between aggressive and dirty if things are not going his way. Possesses great talent on the ball, a threat in the opposition box, but don't be surprised if he sees red.
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Barcelona vs Real Madrid combined XI Gerard Pique Has returned to the kind of form that made him the world's best under Pep Guardiola, no matter who is playing alongside him. Brilliant on the ball, strong in the tackle and dominant in the air, he is the best both teams have to offer.
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Barcelona vs Real Madrid combined XI Jordi Alba Marcelo has been a much improved defender this season but Alba is the superior option in defence and attack. His pace and energy are crucial to Barca's high pressing game.
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Barcelona vs Real Madrid combined XI Toni Kroos Xabi Alonso has been forgotten far more quickly than could have been anticipated because of the ease with which Kroos has slipped in. A true great in possession, Kroos perhaps is found a bit wanting in his defensive duties but one of the best in his possession in the world.
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Barcelona vs Real Madrid combined XI Isco During Real's bad patch since the turn of the year Isco has been the one bright, consistent spot for Carlo Ancelotti. Another who is superb on the ball and has the ability to drive his team forward with his low centre of gravity. This team is perhaps a touch attacking, and Sergio Busquets will play as bigger a role as any of the stars during the game.
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Barcelona vs Real Madrid combined XI Andres Iniesta Still the master. Age may have finally caught up with long-time partner Xavi but Iniesta shows no signs of slowing. Yaya Toure and Fernandinho couldn't get near him on Wednesday night and while he has lost a little bit of pace, his brain is as sharp as any in world football.
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Barcelona vs Real Madrid combined XI Lionel Messi Cristiano Ronaldo may have won the Ballon d'Or at the turn of the year but Lionel Messi has easily been the best player in the world since then. Where Ronaldo has struggled (by their standards) - nine goals in 14 matches - Messi has thrived with 20 in his last 17.
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Barcelona vs Real Madrid combined XI Luis Suarez After taking a few weeks to work it out, his Barcelona debut in the Bernabeu was a real struggle, Suarez has finally clicked with his new team-mates. He may not quite be as prolific as he was during his Liverpool days but he is forming a nightmarish front three with Messi and Neymar that cannot be stopped.
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Barcelona vs Real Madrid combined XI Cristiano Ronaldo Even if he is struggling a bit, are you really going to leave Ronaldo out? Messi might be in better form, but no other player comes close to striking terror into opponents as much as the Portuguese. Gareth Bale and Karim Benzema have been anonymous lately, while Neymar is unlucky to miss out.
"But it has not happened since I'm here.
"There are no non-aggression pacts. Each one tries to make their team more competitive.
"Isco? For the sake of Real Madrid I would speak with the president of Real Madrid."
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