Real Madrid’s Cristiano Ronaldo is expected to play on Saturday despite a minor knee injury. (AP Photo/Angel Fernandez)

Real Madrid could be forced to rest Cristiano Ronaldo as the star forward is fighting a minor knee injury.

Coach Carlo Ancelotti did not reveal the exact injury, but Spanish newspapers reported Friday that Ronaldo has had discomfort in a tendon in his left knee since the win over Schalke on March 18.

The Portugese superstar is still expected to play Saturday’s home La Liga match against Rayo Vallecano.

“He has a small problem but it is not having any negative effect at all,” Ancelotti said Friday (via Daily Mail).  “I don’t think it affects him on the pitch so he’ll play tomorrow as normal.”

Ronaldo leads the league in scoring with 27 goals and also this season’s Champions League with 13.

Ancelotti said Real Madrid had considered resting Ronaldo but that he doesn’t see the need for it right now.

“He is confident and is not complaining about it,” Ancelotti said. “But obviously if things get worse we will rest him but at the moment the player is calm and everyone is calm because it really is a small, small problem.

“He wants to clear it up in the coming days by playing and having treatment,” he added.

Real Madrid currently sits in third place with 70 points, three behind league leader Atlético Madrid.