The Brazil international is close to a return to the first-team after recovering from a shoulder injury and has been included in los Blancos' Champions League squad.
Zinedine Zidane says Marcelo will only make his Real Madrid return against Roma on Wednesday if he is 100 percent fit.
Marcelo sustained a shoulder injury against Granada on Feb. 7 and subsequently sat out the 4-2 victory over Athletic Bilbao, with Dani Carvajal filling in at left back.
The Brazilian has been included in the match squad for the Champions League last-16 first-leg against Roma at the Stadio Olimpico this week.