Leicester City could not overcome the experienced Atletico
The Foxes went out fighting when they were held to a 1-1 draw by Atletico Madrid at the King Power on Tuesday night, losing 2-1 on aggregate.
There was certainly no shame in losing to Diego Simeone's side and as the last remaining English team in the competition, Craig Shakespeare's men represented the country with distinction.
But as Leicester get back to reality next week with a trip to Arsenal, former striker Cottee has delivered an ominous message to the club's fans on Sky Sports.
"It was an incredible, once-in-a-lifetime experience for the fans and probably for most of the players (to reach the quarter-finals of the Champions League)," Cottee said on Sky Sports.
"It's been a wonderful experience for everyone at Leicester and they'll remember this for the rest of their lives.
"But can I ever see Leicester playing in the Champions League again?
"Not in my lifetime."
It is a sobering thought for the Foxes from a fans' favourite.
But after the club's heroic fairytale Premier League title triumph last season nothing can be ruled out.
Yes it is unlikely Leicester will ever experience days like that again, certainly in the near future.
Leicester City parade their Premier League trophy
But this is the club that made football fans believe again and gave renewed hope to middling clubs across sport that the seemingly impossible can be achieved.
What it also did was wake the giants who realised they had allowed their ships to drift which has been evidenced this season with the likes of Chelsea, Liverpool, Manchester United and Manchester City investing heavily in managers and squads to ensure another "Leicester" doesn't happen to them again.