(http://www.theinfostride.com/cdn/img/aronaldo1.jpg)
Real Madrid forward Cristiano Ronaldo picked up an injury in Wednesday's 4-1 Champions League defeat at Borussia Dortmund and is out of Saturday's La Liga match at city rivals Atletico.
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The Portuguese international has a "muscle problem" but the club are hopeful he will recover in time for Tuesday's semifinal second leg at home to Dortmund, assistant coach Aitor Karanka told a news conference on Friday.
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"Before the Dortmund game he had physical problems and he won't be in the squad (on Saturday), " Karanka said.
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"He did not train today," added the former Real player as he again stood in for Jose Mourinho who rarely gives the customary news conference the day before a league game.
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"He has a muscle problem and he cannot help us but we are hopeful he can play on Tuesday," said Karanka.
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Local media reported that Ronaldo felt a twinge in his left thigh during the warm-up before the Dortmund game although he played the whole match and scored Real's goal.
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He is the Champions League's top scorer this season with 12 goals.
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Ronaldo's absence against Atletico increases the chances of La Liga leaders Barcelona being able to wrap up a fourth title in five seasons on Saturday.
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If Barca win at Athletic Bilbao in the earlier kickoff and second-placed Real lose at Atletico the Catalans will have an unassailable 16-point lead with five games left.
Ronaldo has to focus on their game against Borussia Dortmund in the second leg. They would need him to score goals