Real Madrid left-back responded to criticism on Instagram by apologising for his role in Los Blancos’ 2-1 defeat to Girona on Sunday.
Real dropped further ground on La Liga leaders Barcelona with the away defeat to 15th-placed Girona and now sit nine points back from their Clasico rivals.
The defeat led to Instagram fans account, Real Madrid AC, posting a comparison between recent results between Marcelo in the side and 22-year-old full-back Sergio Reguilon, who has emerged as first choice left-back.
Real have only won one of the last nine matches the Brazil international has featured in, while they have won 100 per cent of the last nine Reguilon has played.
The caption accompanying the post read: “Why is Marcelo still a starter? Look I love him but f*** me, you have to be realistic… I hope he returns to his best level as soon as possible!”
Marcelo then replied to the post: “It’s all my fault. We move on!”