Cristiano Ronaldo was unable to train on Wednesday for the second straight day, which increases the concern around Real Madrid that he will be unable to play in Saturday's Clasico.

A club statement read: "Cristiano Ronaldo worked separately from the group, while Luca [Modric] also trained alone out on the pitch as he continues his recovery process."

Real Madrid are currently 11 points behind Barcelona while playing one fewer match.

Ronaldo admitted to having felt some pain in his calf following a crunching foul by Gremio captain Geromel.