Atalanta missed the chance to go third in Serie A on Thursday (AEDT) settling for a 1-1 draw at Udinese, days before taking on league leader AC Milan.
Chelsea defender Fikayo Tomori has completed his loan move to AC Milan, the Premier League club confirmed on Saturday (AEDT).
Ante Rebic, Rade Krunic and Theo Hernandez have been cleared to return to action for Milan.
Stefano Pioli confirmed Milan will consider adding further to their squad in January amid speculation Mario Mandzukic is set to join the club.
Milan has announced Hakan Calhanoglu and Theo Hernandez have tested positive for COVID-19.
Napoli midfielder Fabian Ruiz will miss the Italian Supercup next week after the Spanish international tested positive for coronavirus on Sunday (AEDT).