Atalanta boss Gian Piero Gasperini believes David de Gea's superb double save proved the turning point in his side's defeat at Manchester United.
United were left reeling once again after falling behind in the Champions League, Mario Pasalic and Merih Demiral both having netted first-half goals.
However, a superb comeback from the hosts helped send them top of a tightly-contested Group F, and Gasperini has been left to rue De Gea's heroics.
The stopper, who looks back to his best this season after enduring a lengthy dip in form, denied Duvan Zapata and Ruslan Malinovskyi with Atalanta narrowly ahead.