The Portugal international is out of contract at the end of the season in England
Barcelona are exploring options to strengthen at right-back and heading their list of targets at the moment is Manchester United's Diogo Dalot.
The Portuguese international fits the bill because he is young (23), has quality and because he is a genuine market opportunity as his contract expires.
Barça weighed up a move for Dalot in the summer. United were interested in Sergiño Dest and an exchange deal was mooted.
There was no agreement, though, because United coach Erik ten Hag did not want to get rid of Dalot, who has become a key part of his team since.
After several years in Manchester, Dalot seems to have finally found some consistency and is having a good campaign for both club and country.
Barça have monitored him for years but in recent weeks they have stepped up their interest. They feel his profile fits, he's a good age and his contract is expiring.
United do have an option to extend his terms by an additional year. It's similar to Cesar Azpilicueta's case last summer, but Barça would be prepared to pay a small fee for Dalot.
So far, United have not broached a renewal although no one doubts they will take up their one-year option at this stage.
Barça are not the only club watching developments. Italian sides Juventus and AC Milan have also sounded out Dalot's camp, but the player would be more open to a move to LaLiga.