The Europa League winners are still in need of a quality creative midfielder after selling Ivan Rakitic to Barca in June.
Barca sent former Manchester City playmaker Denis Suarez in the opposite direction on a two-season loan arrangement as part of the deal, but Sevilla now want to draft in Roberto too.
The 22-year-old made only one La Liga start for Barcelona last season but he could figure more prominently under new manager Luis Enrique this year.
Roberto has less than a year left on his contract at Barca and the club are keen for him to extend his stay, but Sevilla could look to tempt him away from Catalonia with the promise of greater first-team involvement.
