Cristiano Ronaldo looks to be battling a fitness problem ahead of the Champions League final on Saturday. 

The Real Madrid star limped out of training on Tuesday with what looked to be a muscle problem, as a team at the Valdebebas training ground examined his thigh.

.@Cristiano Ronaldo exits @realmadrid training early with an apparent thigh problem... #UCLfinal pic.twitter.com/w6KUTWOd7j

— Champions League (@ChampionsLeague) 24 May 2016

With his side taking on Atlético Madrid this weekend, it looks as though the Portuguese international will now be racing to be fit for the showpiece final in Milan.

Ronaldo has been unable to complete the last three training sessions with the Madrid squad, and limped out of his side's last game of the season against Deportivo La Coruña, as he was replaced at half time by James Rodríguez.