The Brazilian had initially declared he "didn't care" if the fans booed because they "had no influence" on his performance.
Yesterday, Marcelo clarified: "The people of the city show their love for me wherever I go and in the stadium the fans are nice to me.
"I've seen that somewhere it's suggested I do not directly respect the views of supporters. I want to qualify this is not so, I want to clarify if I have not expressed myself well.
"I feel a deep respect for all those fans who encouraged the team."