But while Harry is less confident about England's chances, his brother Prince William appears to be more optimistic.
England play Croatia at 4am on Thursday morning for a spot in the world cup final, where the victor will play either France or Belgium. We want this to be a family-friendly occasion and a chance for England fans young and old to show the positive spirit of football to the country and the world.
'The hunger of players has been there for everyone to see, we are proud of the style they have played.
And now the Museum of London wants to bring Southgate's waistcoat home following the World Cup.
"Our supporters and our country has had a long time suffering in terms of football".
Harry, who was visiting Dublin with wife Meghan, was asked by a reporter if "football was coming home" - the chant from the hugely popularly Three Lions anthem. Our country has been through some hard moments recently in terms of unity but sport has the power to unite - and football in particular has the power to do that.
Southgate's side have been buoyed by more than just an anthemic pop song, though.
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Southgate was speaking ahead of England's World Cup semi-final against Croatia at Luzhniki Stadium in Moscow on Wednesday - the Three Lions' first appearance at this stage of the tournament in 28 years.
Warnings to England fans and players had ranged from the supposed threat lurking from masses of hooligans, to players being seduced by Kremlin-backed 'honey traps'.
"Hopefully they'll just get their heads down, work hard and get the win for us".
Against Sweden (2-0 win in the quarter-finals) they were magnificent.
Southgate, though, has not forgotten others who have assisted him as a player, manager and person, adding: "Whenever you are involved in a tournament like this you think about those who have helped along the way: every coach and teacher, players I've played with..."
"This generation has been underrated due to their results but they've had the quality and now they are showing it".