Prince William may have given England's 3-0 win over Peru the royal seal of approval, but Roy Hodgson is refusing to get carried away with his squad's progress.
England emerged victorious from their final World Cup warm-up game on home soil on Friday night.
Just 24 hours after claiming the fortnight-long training activity in Burton and Portugal could not have gone any better, Daniel Sturridge scored a stunning opener before Gary Cahill and Phil Jagielka rounded off the win in front of over 83,000 supporters at Wembley.
In stark contrast to the run up for Euro 2012, and other previous tournaments, England do not have any injury concerns. All 23 players will head to Miami for England's final training camp on Sunday.
There are no rumblings of discontent among the squad and arguably the biggest obstacle to England's progress to the knockout stages - Luis Suarez - may miss out on Uruguay's game against the Three Lions due to a knee injury.
So all this is surely too good to be true, Hodgson was asked following Wembley win.
"Yes, that's probably right," the England manager said.
"And that is why I am very cautious. I hope my feet are on the ground, I know the players' feet are on the ground.
"You have to be satisfied when things go well. Portugal went well, St George's Park went well and we got the result we wanted against Peru.
"But it doesn't win us games in the future, it just means that we will have a nice couple of days before we start working again.
"It's just one small step on the journey we are taking so we need to keep working and keep concentrating."
Despite Hodgson's words of caution, the sense of optimism was clear to see on the faces of the players and the fans as they filed out of Wembley on Friday night.
That positivity was also present up in the Royal Box, where Prince William clapped enthusiastically every time England found the net.
The Prince, who is president of the Football Association, visited the home dressing room after the match to congratulate the players and wish them good luck for the World Cup.
Hodgson added: "We always knew the Prince would come in (to the dressing room). He is an enormous supporter of the Football Association and the England team.
"I was happy that he came into a happy dressing room. It was really nice to see him. He had a long chat with the players and wished us all the best for Brazil."
Phil Jones and Alex Oxlade-Chamberlain, who ended the season with shoulder and knee problems respectively, are fully fit despite sitting out Friday's game, Hodgson said.
Luke Shaw will also be fine to travel to the United States as he is only suffering from a minor cold.
There were concerns when Leighton Baines had to be substituted in the second half, but Hodgson insists the Everton left-back is fine.
"He suffered a bit of cramp and that made us cautious so we took him off," the 66-year-old said.
England arrive in Miami, where they will play Ecuador and Honduras, just after midnight on Monday.
Hodgson has given his players the day before off. Many of them will attend Carl Froch's world super-middleweight title defence against George Groves at Wembley on Saturday night, but Hodgson will head to Craven Cottage to watch Group D rivals Italy play the Republic of Ireland instead.
Hodgson does not share his players' enthusiasm for the Wembley fight, which will be watched by 80,000 spectators and many more on television.
"Boxing has never been a sport I have taken any interest in whatsoever," Hodgson said.
"You could write what I know about boxing on a postage stamp but the players are free so how they want to spend their Saturday is their own business.
"I am looking forward to going to watch the match and no doubt I will find out who wins (the fight) but honestly I have no interest in it."