But Zinedine Zidane's side face a bigger struggle to retain their Champions League title, after being handed a tough quarter-final draw against Bayern Munich.
Atletico's place in today's last-eight draw was rarely in doubt following a comfortable win in the first leg in Germany but Oblak was repeatedly called on to preserve his side's unbeaten run at home in the competition this season.
UEFA director of competitions Giorgio Marchetti prepares to make a selection during the quarterfinal draw of the UEFA Champions League.
Leicester City will play Atletico Madrid in the Champions League quarter-finals.
Teenager sensation Kylian Mbappe scored two goals for Monaco whilst eliminating Manchester City enhancing his already growing reputation, dark horses the French side maybe but this team has a real attacking threat.
Bayern earned the nickname "La Bestia Negra" ("The Black Beast") after consistently knocking Real out of the competition, but Madrid has won the last three competitive matches between the two clubs.
They have met 10 times in two-legged European ties with each progressing five times.
The Foxes, who last month sacked Claudio Ranieri despite him masterminding their unlikely charge to last season's Premier League title, will travel to the Spanish capital for the first leg.
Cheltenham Festival: Opinion divided on Gold Cup day
But poor Lizzie Kelly, having her first ride in the Gold Cup got no further than the second fence on Tea For Two . Native River (7-2) was a short-head away in third and Djakadam - twice the runner-up - was fourth.
This Real Madrid fan saw the opportunity to be a bit cheeky however.
"It is nearly like master against student", commented Zidane, reminding reporters in Real Madrid's Friday press conference that he had been assistant coach to Ancelotti during his spell in Madrid. "I would want to meet Barcelona next. But they have a fantastic team with a fantastic coach".
There will also be a repeat of the 2015 final, with Juventus drawn against Barcelona.
Dortmund chairman Hans-Joachim Watzke was relieved not to draw Bundesliga rivals Bayern.
"I don't think there will be a single coach who are hoping they face Leicester", Zidane said.
"It is going to be exciting to play against them". It's a hard match.
"Was it better to play the second leg at home?" We will have to play two great matches to get to the next round.