Barcelona have signed defender Marlon Santos on a permanent deal, reports according to his agent, Fred Moraes, he spoke on Radio Barcelona that "the deal has been finalised between Barcelona and Fluminense”However, there seems to be still a lingering doubt whether he will be staying at Catalunya next season or be going on loan to another club. “The next thing now is to speak with the club, with [Barca directors] Andre Cury in Brazil and with Raul Sanllehi, to see what's best for next season”, he added.“The club have already decided [to make the deal permanent], but there's still a decision to be made moving forward”, he continued.However, Marlon’s agent also added that "his client is very committed to Barcelona and would like to be at Camp Nou for a long time, “Our idea is for Marlon to stay at Barcelona for many years and to continue learning, as he's doing at the moment”, he said.He will cost Barcelona a fee around €6 million.He made his La Liga debut in Barcelona’s last fixture against Las Palmas and completed 90 minutes, in a 4-1 win where his compatriot Neymar scored a hat-trick. “I want to congratulate Marlon because it is not easy playing for the first team, away from home in those circumstances”, Barcelona captain Andres Iniesta told their official website, “He is training and playing with us because he has what it takes”. High praise indeed.Whoever comes in as the new manager at Barcelona will undoubtedly look to strengthen the backline and get rid of some deadwood. It remains to be seen that if the new manager sees Marlon as a first team player right from the start, or he decides to loan out the 21-year-old.