Cristiano Ronaldo a doubt for Denmark clash?

Real Madrid star Cristiano Ronaldo could miss Portugal's Euro 2016 qualifier against Denmark on Tuesday with a knee injury.

The Ballon d'Or winner was substituted in the 76th minute of Portugal's 2-1 international friendly loss to France last night and was seen applying an ice pack to his left knee immediately after leaving the field.

Ronaldo was kept relatively quiet throughout his spell on the pitch as he played in a central role up front.

The 29-year-old has been in scintillating form so far this season, netting 13 goals - including three hat-tricks - in just seven La Liga games.