Barca are willing to hand the Dutch youngster a free transfer after deciding there is no room for him in the club's B team next season.
However his agent, Carlos Barrios, assures that it is Chelsea who has the advantage to take him on.
Mbuyama wants to leave Barcelona despite having only been at the Blaugrana youth academy for a year and still having three years left on his contract,
Barrios conceded to Voetbal International: "The ambiguity is huge. New elections are approaching. If you see that even Ansu Fati could leave on loan, how can you not go?"