Cristiano Ronaldo & Eric Bailly
Cristiano Ronaldo suffered an injury later during the win over Villarreal. Reuters

Real Madrid have confirmed that Cristiano Ronaldo suffered a muscle strain in his right thigh during the 3-0 victory over Villarreal on 20 April, which could keep the star sidelined for several days. The news comes as a massive blow for manager Zinedine Zidane ahead of a crunch week for their hopes of winning both La Liga and the Champions League, with his side ready to visit Rayo Vallecano on Saturday just three days before their trip to Manchester City.

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Ronaldo set alarms bells ringing during victory over Villarreal after being forced to leave the pitch in the final minutes of the game, leaving Real Madrid with 10 men.

Zidane admitted concerns in his post-match press conference, but refused to set a deadline for his recovery.

"[Ronaldo] felt something right at the end, but I can't confirm anything yet," Zidane said. "I think it was more of a scare than something serious. [Tomorrow] we will calmly see what Cristiano has but I'm calmer now."

Ronaldo himself took to Instagram to play down worries with a positive message to his fans, saying: "All good. Thanks for your support."

All good. Thanks for your support 💪🏽👍⚽️👌✌️

A photo posted by Cristiano Ronaldo (@cristiano) on

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Reports in Spain suggested the injury was not serious, and despite expectations he will be rested for the Liga game with Rayo as a precaution, he could be available against Manchester City.

Real Madrid have now given an official update to confirm the injury after the star underwent a scan on Friday morning. It looks like the Portuguese star will definitely miss the Rayo encounter but the club failed to clarify whether he will feature for the trip to Manchester City on 26 April.

"Following tests carried out today on Cristiano Ronaldo in the Sanitas La Moraleja University Hospital, he has been diagnosed with a muscle strain in his right thigh," Real Madrid confirmed. "His recovery will continue to be assessed."