Cristiano Ronaldo gives Juventus a scare as forward limps out of Portugal's Euro 2020 qualifier with Serbia

Cristiano Ronaldo has dealt Juventus a huge blow after the Portugal captain limped out of a clash with Serbia.

The forward came off after 31 minutes of the match, with Portugal trailing 1-0 after Dusan Tadic scored from the penalty spot.

The injury, which appeared to be in the hamstring region, could rule the former Manchester United star out of a crucial Champions League clash against Ajax.

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The Serie A side are eyeing Champions League glory after Ronaldo’s hat-trick put them through to the Champions League quarter-finals, overturning a 2-0 deficit against Atletico Madrid in the first leg.

Juventus will travel to Amsterdam to take on Ajax on April 10 in the first leg before returning to Turin for the second leg.