Manchester United was two goals down in the First Half against Atalanta FC before they regained their consciousness in the Second Half to carry the day.
Atlanta scored their first goal in the 14th minute through Passalic while their second goal was scored by Demira in the 28 minutes of the Half Time.
The Second Half saw Ronaldo bouncing back with other strikers to score three goals through Rashford in the 52nd minutes, Maguire in the 74th minute and Ronaldo scored the last goal in the 80th to silence Atalantas.
Man Utd XI: Ronaldo, De Gea, Lindelof, Maguire, Fred, Shaw, Bruno Fernandes, Rashford, Wan-Bissaka, McTominay, Greenwood
Subs: Cavani, Mata, Matic, Alex Telles, Pogba, Lingard, Bailly, Dean Henderson, Van de Beek, Dalot, Sancho, A. Elanga
Atalanta XI: Ilicic, Muriel, Palomino, De Roon, Freuler, Zappacosta, Pasalic, Musso, Demiral, T. Koopmeiners, J. Mæhle
Subs: Zapata, Rossi, Sportiello, Malinovskiy, Miranchuk, Pezzella, Piccoli, M. Lovato, G. Scalvini