Juventus star Cristiano Ronaldo tests positive for Covid and likely to miss clash against Lionel Messi's Barcelona - reports

Star striker must remain in quarantine after another positive result

Juventus star Cristiano Ronaldo. Reuters

Cristiano Ronaldo has again tested positive for coronavirus as Juventus prepare for next week's Champions League clash against Barcelona, according to reports in Italy.

Ronaldo is currently isolating at his home in Turin after testing positive for Covid-19 on October 13 while with the Portuguese national team for Nations League matches.

The 35-year-old again received a positive result after a test carried out on Wednesday, Sky Sport Italia and Gazzetta Dello Sport reported.

The Portuguese forward seems doubtful for Sunday's Serie A game against Hellas Verona, and the clash against great rival Lionel Messi's Barcelona on October 28.

Under UEFA rules the five-time Ballon d'Or winner needs to test negative 24 hours before the Barcelona game in Turin to be included in the squad.

Ronaldo, who has no symptoms of the virus, has continued training at home posting a video on social media of himself training in his high-tech gym, sporting a new shaved head look.

"Success in life is not measured by what you achieve, but by the obstacles you overcome," Ronaldo wrote, as he gave the thumbs up.