Zlatan Ibrahimovic has tested positive for COVID-19.
"I tested negative to Covid yesterday and positive today. No symptoms whatsoever. COVID had the courage to challenge me. Bad idea," wrote Ibrahimovic on Twitter.
Milan said they have "informed the relevant authorities and the player has been promptly placed in quarantine at home. All other team members and staff have tested negative."
Ibrahimovic scored two goals in AC Milan's win on Monday.
Ibrahimovic returned to Milan last December after leaving MLS side LA Galaxy.