Cristiano Ronaldo has tested positive for Covid-19 for a second time, according to reports in Spain.
Ronaldo had initially tested positive on October 13 and UEFA regulations say he must return a negative result at least a week before a match to compete.
He has not been able to do so and will therefore miss a reunion against Lionel Messi in the Champions League next week when Juventus take on Barcelona.
The 35-year-old insisted he followed the guidelines when testing positive after questions were asked over whether he should have returned to Italy.
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"A gentlemen here in Italy, whose name I won't mention, said I didn't obey the protocol - that's simply a lie," Ronaldo said from his Turin villa.
"I followed all the protocols and I will continue to follow them, my conscience is clear... Everything I did was authorised."
Ronaldo will also miss Juventus' Serie A match against Genoa on Sunday.