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Gary Lineker and Rio Ferdinand couldn't hide their bewilderment after Jurgen Klinsmann delivered England fans with a brutal reality check over their Euro 2020 prospects
Gareth Southgate's side will face Denmark at Wembley on Wednesday night in their second major tournament semi-final in just three years.
The Three Lions will go into the match as heavy favourites to progress to Sunday's final, where they will face off against either Italy or Spain.
But former Germany international Klinsmann believes England fans need to hold back from getting too carried away.
Speaking to BBC Sport prior to Tuesday's match, he explained that Denmark's journey through the tournament has been a "fairytale", and that they could spring a surprise if they get an early goal against England.
Jurgen Klinsmann explained why he is worried about England's chances against Denmark
"They deserve a lot of respect," Klinsmann said of the Danes. "What they've done since that incident with Christian Eriksen is unbelievable, a fairytale, they deserve every compliment they get.
"The risk for England is that everything is too perfect already.
"Everything matches up. They're in sync, they're playing well, they bring in whoever they want to bring in and they do well. Everything looks perfect.
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"The question is, if Denmark score a goal, how do they react then? Hopefully it doesn't happen, but there's a long way to go."
Those comments weren't received too well by Ferdinand, who was quick to interject.
He interrupted Klinsmann by sarcastically saying: "Yeah cheers, Jurgen. Cheers mate."
Gary Lineker seemed to take Jurgen Klinsmann's words with a pinch of salt
Lineker joked: "Nothing like a reality check. No problem at all with that."
England's last semi-final experience ended in heartache as they suffered defeat to Croatia in the 2018 World Cup.
On that occasion, Kieran Trippier's early free-kick was cancelled out by two late goals to send the underdogs through to an unlikely World Cup final.
Will England reach the final of Euro 2020 by beating Denmark? Give us your thoughts in the comments section.
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But Ferdinand believes Southgate and his staff will have learned a lot from that game, and will have planned meticulously since.
He said: "The togetherness, it all comes from Croatia in 2018, that's not something that's happened overnight. Since that, he's seen what went wrong and they've worked on it.
"They can change formations, they can bring in different players at any time, nothing changes. Sancho is a great example. He came in after not playing the first four games.
Rio Ferdinand was full of praise for Jadon Sancho
(Image: ITV Sport)
"Look back at other teams, my teams for example, they'd have been sulking around the camp, speaking to their agents at home, when they get the excuse they'd be looking for excuses saying 'I'm not fit enough'.
"These guys are professionals. They know what their job is and they go out and do it to a t. I think our squad at the time had more world-class players. This team has a better squad, a much better squad.
"Players come in and change the game, there's no drop off in the quality of players at all."