The two facets performed out a 1-1 draw at Stamford Bridge which intended the Blues stepped forward to the knockout phases as runners-up.
However, it does go away them unseeded within the ultimate 16 and the chance of dealing with both Barcelona, Paris Saint-Germain or Besiktas, as issues stand.
Saul Niguez put the guests forward and a win can have enabled them to growth had Roma no longer crushed Qarabag.
Stefan Savic grew to become Eden Hazard’s move into his personal web for the equaliser and Chelsea piled forwards searching for a winner.
But they fell simply brief, which used to be partially all the way down to the efficiency of Atletico goalkeeper Jan Oblak.
And Cahill used to be stuffed with reward for the shot stopper after the sport.
“We more than deserved the win, we had some fantastic chances,” Cahill informed BT Sport.
“How have we no longer gained? We will have to have gained.
“You can pick out holes in any function you concede however general our efficiency used to be excellent.
“Jan Oblak used to be unbelievable these days, he is had an ideal sport.”
Chelsea go back to Premier League motion in opposition to West Ham on Saturday (12.30pm).
And they are going to have to attend till subsequent Monday to determine their subsequent Champions League combatants.