Milan have confirmed left-back Theo Hernandez has tested positive for COVID-19.
The 24-year-old played a crucial role in France's Nations League success, scoring a dramatic 90th-minute winner in the 3-2 semi-final victory over Belgium before assisting Kylian Mbappe's decisive strike in the 2-1 final triumph over Spain.
The showpiece contest against Luis Enrique's Spain was held in Milan, meaning Hernandez was able to stay in the city as he returned to his club side.
However, he is now set to miss the visit of Hellas Verona on Saturday as club action resumes.
Hernandez has enjoyed a fine start to the season with Milan, leading the Rossoneri in Serie A for assists (three) and expected assists (1.39) while also scoring once.
Fode Ballo-Toure would appear Hernandez's most likely deputy as second-placed Milan look to close the two-point gap to leaders Napoli.
Stefano Pioli's side are unbeaten this season, earning 19 points from seven matches. Victory would make this their best start through eight games in the three-points-per-win era.