Real Madrid left-back Marcelo is a doubt for the looming Clasico clash with Barcelona after limping out of Tuesday's Champions League 1-0 Group A win over Paris Saint-Germain with a hamstring injury.

The Brazilian picked up the problem midway through the first half of the game at the Bernabeu, and was replaced by versatile defender Nacho Fernandez, who scored the night's only goal just two-and-a-half minutes later.