Matteo Ruggeri's cross found Sørloth, who confidently slotted home with a sidefoot past Simon Mignolet. Later, a one-two between Lookman and Griezmann led to another goal for the Norwegian striker, who finished from six yards to seal Atletico's place in the draw.
With the two-goal advantage, Atletico will now face either Liverpool or Tottenham Hotspur in the round of 16, scheduled for Friday's draw.