Karim Benzema put Real Madrid on the score sheet scoring the first goal following an assist by Luka Modric.
Real then struggled to find a second goal to tone their win and in the 60th minute, Ramos put in a penalty from the spot giving the Europe giants an assurance into the next round.
Luis Muriel scored in the 83rd minute to give Atlanta their only goal in the game but a counter goal in the 84th minute by Marco Asensio following an assist by Lucas Vasquez gave Real Madrid the perfect win.
On the other game of the night, Manchester City cruised through Borrusia Borussia Mönchengladbach with a comfortable 2-0 win but 4-0 on aggregate following goals by Ilkay Gundogan and Kevin De Bruyne.
