At times Simeone appeared to want to join the action on the pitch, such were his energy levels on the touchline, gesticulating wildly and imploring his players to stand firm. There's nothing for us to be scared of. Like Vardy, he will attract interest from Champions League clubs when the dust settles on the season. "Yes, absolutely", said Wes Morgan.
He is only under contract until the end of the season and said he was looking forward to sitting down with the club's Thai owners, the King Power travel retail group, to discuss his future.
Mahrez, too, has shown a return to the form that earned him the Player of the Year award last season. "We got the goal, but couldn't quite get the breaks to get any more". The lads can be proud of themselves, they have given everything.
Atletico Madrid manager Simeone said: "I'm full of emotion and pride at the performance of my team".
Atletico took the lead on the night in the 26th minute through Saul Niguez.
Again, as in Seville in the last 16, it was Vardy who came up with the goods when he rammed in from close range after Chilwell's deflected drive bounced into his path.
This season, they have enjoyed fine wins over such European nobility as Manchester City, Liverpool, Porto and Sevilla, but sat a point above the relegation zone as recently as two months ago. I'm not sure who thought we could get this far, but we believed in ourselves and we achieved something massive.
"Fortunately for Simeone's boys, Leicester gave away the first half".
However, a freaky own goal from Real captain Sergio Ramos levelled things up at 3-3 overall before Bayern saw midfielder Arturo Vidal sent off late on and they went into extra time with 10 men.
And Morgan feels the Foxes's star players will not turn their back on the squad after the end of their incredible journey.
A skied Shinji Okazaki effort from Vardy's cutback and a tame Riyad Mahrez volley straight at visiting goalkeeper Jan Oblak were all the hosts could muster by half-time against their Champions League-hardened opponents. "We're back to the league now".
"The team did what we needed to do to go through".
Leicester's remaining six league games will undoubtedly serve as a telling indicator of what lies in store for the side, and whether the last 21 months have opened a new chapter in the club's 133-year history.
England striker Vardy told BT Sport: "We knew it was going to be hard".
Leading 2-0 on aggregate, Atletico could relax knowing they had conceded just seven times in their previous 17 Champions League outings. Offering continuity from Nigel Pearson's tenure, here is a man who can continue to drive Leicester in the right direction. Did his best to push forwards towards the end as Leicester went for broke. The likes of Ndidi, Chilwell and Demarai Gray offer the Foxes a promising platform from which to build upon.
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