The Argentine said that he and girlfriend Oriana had returned positive tests but are in “perfect condition.”
Juventus also confirmed that Dybala is showing no symptoms and has been self-isolating at home since March 11.
AC Milan’s technical director Paolo Maldini and his son Daniel, who plays for Milan’s youth team, are both in quarantine after testing positive for COVID-19.
The club also confirmed that it has closed its headquarters and training centers until at least April 3.
Rugani, the first player in Serie A to contract the coronavirus, appeared in high spirits when he revealed he had been reading Harry Potter to improve his English while in self-isolation.
Meanwhile, former Manchester United midfielder Marouane Fellaini, who currently plays for Chinese Super League side Shandong Luneng, has tested positive for COVID-19.
“I can assure you that everything is fine for me now,” Fellaini posted on Instagram.
“Thanks to the fans, medical staff and the club for their care and attention. I will follow the treatment and hope to return to the game as soon as possible. Please everyone stay safe.”
Fellaini, who joined Shandong in January 2019, is asymptomatic and has now been placed in hospital quarantine, according to a statement from the Chinese club.
CNN’s Homero De La Fuente contributed to this report.