The Italian club have agreed to play in Leeds during the final weekend before the start of United’s Championship season.
Leeds traditionally play their last friendly of the summer at home on the final Saturday before the campaign begins and Atalanta will provide the strongest opposition among the teams lined up to meet Garry Monk’s side.
United play Shelbourne and Shamrock Rovers in Dublin next week before contesting two friendlies in the space of 24 hours against Guiseley on Fri, July 22 and Peterborough United on Sat, July 23.
Atalanta, who are based in Bergamo in northern Italy, finished 13th in the Serie A table last season.