Real posted a video on Twitter and Instagram showing the Brazilian finding the net in training, but only after embarrassing a few of his team-mates.
The 29-year-old can be seen plucking the ball out of the air with a sumptuous first touch before beating two players with some dazzling footwork and finding the far corner.
The defender had orignally been on international duty with Brazil and captained them Ecuador last time out. However, with Marcelo suspended for the Selecao's next game against Colombia he was allowed to return to his club early, though some of his team-mates may now be wishing that hadn't been the case.
Check out the goal for yourself below.
Bravo, @MarceloM12! #HalaMadrid pic.twitter.com/mkD9RRcD0g
— Real Madrid C.F. (@realmadriden) 4 September 2017