From the article
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It's not Alemany's first trip to Manchester. He spent several days at City's base in the summer, speaking about various players. Ferran Torres was another player Barça liked, but his possible signing is even more unviable.
The former Valencia forward has a contract until 2025 and his value has grown since he joined City. His evolution under Guardiola, as well as with Spain, mean City would demand much more than the 24 million euros they paid for him.
The third name is Bernardo Silva. The Portugal international has been differential for Guardiola's side this season but was close to leaving in January. He expressed a desire to leave but didn't because no European side decided to bet on him.
Silva would prefer to move to the Spanish league, with Barça one of the favourites. In terms of style, he would fit perfectly at Camp Nou, but City would require a fee that Barça cannot take on.
So basically Barca have a dream list which they can't afford.