Gavi is a Barcelona bound player, speculations will definitely arise from different sources stating good players will move this and move that. I don't even think those Premier League linked clubs are ready to pay for his released clause.
When it comes to player signature, they'll have to do away with Frank De Jong because he will fetch the club better funds than anyone. Next in line would be Dembele, he's been them best attacking player after Robert Lewandoski. His sale will raise good funds for the club.
Once again about Gavi, he's a Spanish player exciting player excelling at Barcelona, I don't think his parents or guidance will allow him move outta the Spanish La Liga. He's a better player at Barcelona.
Barcelona will not let go of their young stars, be it Gavi or Pedri. these two La Masia stars, will be Barcelona's foundation players for the next few seasons. even if there are clubs interested in signing him, at least Gavi has a fantastic release clause. even so, after all Gavi became part of Xavi's future projects.
For De Jong, he became a crucial player in the Barcelona squad. under Xavi, the midfielder showed great performance in the Barcelona midfield. Recently, Barcelona said that they were grateful not to let De Jong go last summer, at that time, United almost signed the player but for one or two reasons the transfer was cancelled. but recently rumors, Football Insider claim, that Manchester United still have a chance to recruit De Jong. The reason is, Barcelona is reportedly ready to sell the midfielder in the summer. however, as a Barcelona fan I hope that these rumors are not true.