There was some unwanted controversy attached with the squad after last match's hero Domagoj Vida coming up with a pro-Ukraine video to celebrate the win over Russian Federation.
England's young guns have already achieved so much more than their past grou of underperforming players that they can feel proud of but this group of players has sets it sights on lifting the trophy on the 15th of May and that is driving them on.
"They'll be the best team we've played in terms of what they're capable of doing with the ball, and what their individuals are capable of, definitely", Southgate said ahead of the game on Wednesday, as quoted on Sky Sports.
Croatia had 45 minutes to keep their World Cup dream alive but with Modric well contained, and Strinic and Vrsaljko forced into playing long balls, an equaliser look like it would be hard to come by.
"I don't mind you getting excited, but it was a semi-final!"
Ivan Perisic has scored four goals at the World Cup for Croatia - only Davor Suker (six) has more.
The quartet of former footballers were last together earlier in the tournament and viewers got a real kick out of Keane telling his colleagues to cool the jets after they beat Panama 6-1.
The squad fly out to the Russian capital, Moscow, on Tuesday afternoon for their first World Cup semi-final in 28 years.
Duke and Duchess of Sussex arrive in Ireland for tour
Harry said his grandmother has since spoken of the fantastic welcome she received. Meghan Markle wore a pantsuit that means business. Although you couldn't tell by watching her.
England's Golden Generation didn't come to fruition as the likes of Steven Gerrard, Frank Lampard and Wayne Rooney failed to take the Three Lions past the quarter-finals.
"There is still a lot to play".
The fact that Henderson was probably England's best player and yet was pushed to the absolute limit showed just how good Luka Modric is.
"Let me tell you, whether we win or lose the game, my life will not change", he said.
Gareth Southgate's men have ripped up the script over a remarkable a month that now sees them preparing for a semi-final clash against Croatia. But there is less pressure on them now.
"We knew what was at stake and how important the semi-final is for a small country like Croatia", he said.
With Trippier and Young facing a double threat, England's midfield began to be stretched with Jordan Henderson taking on an unmanageable work-load and Jesse Lingard and Dele Alli more pre-occupied with helping out the defenders than asking questions of Croatia's back-line.
Goalkeeper Danijel Subasic soldiered on against Russian Federation despite hurting a hamstring, while right-back Sime Vrsaljko is expected to miss the game.
But Southgate thinks talk of that handing a physical advantage to England is being overplayed.