MADRID, Spain - Real Madrid coach Jose Mourinho isn't sure if the injury Cristiano Ronaldo picked up in a 7-0 win over Malaga is serious.

"I don't know. It seems like a serious injury, that's the negative note from the game," Mourinho said on Thursday at Santiago Bernabeu Stadium. "Especially as Ronaldo doesn't just do small things."

Ronaldo limped off with a muscle problem in his left leg after scoring his third goal in the 77th minute. The Portugal forward matched Barcelona forward Lionel Messi's league-high tally of 27 goals with his 37th score of the season. The Portugal forward ended a five-game drought without a goal.

"I don't think I'll play Sunday" against Racing Santander, Ronaldo was quoted as saying. "I don't think it's too serious but there's still a lot of season left."

But Mourinho soon followed up his initial words with more encouraging ones over his star player's health.

"If Cristiano has something it's something minor, it's no drama," Mourinho added.

Ronaldo missed over one month from ankle surgery last season but has been healthy enough to play in 40 of Madrid's 41 games this season.

Madrid pegged back to within seven points of Spanish leader Barcelona with the victory.