"Maybe (that was) a effect of being ahead and being the least experienced team in the tournament with the chance to get to a World Cup final", he added. "I don't think realistically we expected to be here".
The young England squad achieved what many believed to be the unachievable as they progressed into the semi-final of the World Cup - the first time in 28 years.
"We had hoped [for this] and we believed in our team, but the feeling when we finally entered the finals can not be compared to anything", said Croatia fan Ivan Kecerin.
"We'll be ready as a group to go again because the group have huge pride in their performances in the way they work".
England captain Harry Kane will likely come home from the Fifa World Cup with the Golden Boot as the tournament's top scorer and a burnished reputation as a feared forward.
Croatia, a country of about 4 million people, came to a standstill as fans watched the game on screens in squares and cafes. The scenes in Croatia's capital of Zagreb were astounding.
In Moscow, Croatia fans said they were taken aback by their side's win. "We have one more game left, and we have never been more motivated".
He has since rediscovered some of his best form in Ligue 1 and made his return to the Italy national team for the first time since 2014, scoring in a friendly against Saudi Arabia in May. Thank you, England": "A simple message of gratitude from the Express, accompanied by a picture of Southgate and his players showing their appreciation to the travelling supporters.
"It was a good game".
Theresa May has said she wants to honour England's World Cup team with a reception at 10 Downing Street in recognition of their achievements.
Customer Dean Lovett, who was checking in, said: "It's going to be really tight when I get there".