"It was one of the major decisions in the game", he said.
The Chilean saw red in the 84th minute after picking up a second yellow card after appearing to win the ball in a sliding tackle.
He said after the match: "We gave an excellent team a really good shot". "The calls made by the referee hurt us a lot". Antoine Griezmann had scored the only goal in that game, from the penalty spot.
And after helping guide the Foxes to the quarter-finals after replacing Claudio Ranieri in February the boss would welcome the chance to talk about his future before the end of the season with his contract as manager expiring in June.
Vardy had a flick comfortably saved by Oblak and Mahrez whipped a free kick from 20 yards just over the crossbar, but Leicester still could not find another way through a packed Atletico backline.
But despite a spirited second leg display, the 1-1 draw means Atletico progress via a 2-1 aggregate win.
Whether or not we'll be seeing these kinds of penetrating runs from Griezmann in the Premier League next season remains to be seen. "They should want more of this, all players want to play at the highest level, which the Champions League is". "We deserved to go through".More news: May wins House of Commons backing for snap general election
The opening 45 minutes were balanced between the two sides, but Bayern was dominant after halftime as it pressed forward, trying to overturn the first-leg deficit.
"The big teams are Bayern, Barcelona, Real Madrid, especially in the financial aspect", he said.
Jamie Vardy gave the reigning Premier League champions hope with a goal on the hour mark.
40 per cent - Leicester's average possession in Champions League games according to statistics on uefa.com.
Manager Craig Shakespeare has challenged his Leicester team to reach the Champions League again after their quarter-final loss to Atletico Madrid.
Security guards and Bayern fans got into a confrontation at the stands at halftime but the altercation ended quickly.
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Marc Albrighton's 61st-minute cross into the area prompted a goalmouth melee, allowing Jamie Vardy to pounce.
And then just after the English side's best spell of the match came the sucker punch for Leicester.
"Before you try to make headlines, we're not one of the greats only in that sense". We made a tactical change with Leo [Leonardo Ulloa] on to give an aerial threat.
The tactic certainly made life hard for Atletico.
"But I have to say what a great performance from Leicester, it was nearly a pleasure to compete against them".
On more than one occasion, both domestically and in Europe, Leicester have shown that anything is possible and Drinkwater revealed the squad felt they were capable of going all the way in the Champions League. "They never let their heads drop", he said. We were living in fear all night of what they might achieve.More news: Console Repairmen Explain Why Cockroaches Love PS4s
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