England are now in uncharted territory; they are in a land of positivity and confidence after Harry Kane's dramatic late victor secured a 2-1 victory against Tunisia in Volgograd to ensure a dream start to Russian Federation 2018.
Harry Kane celebrates scoring during England's 2-1 win over Tunisia in the World Cup.
Kane and England made the flawless start to the tournament as he tapped home from close range to score after just 11 minutes.
Tunisia hit back, however, after England had squandered numerous chances and made it 1-1 thanks to Ferjani Sassi's 35th-minute penalty.
Tunisia will face Belgium in Group G fixtures on June 26.
At the last World Cup, England couldn't even win a game.
The introduction of Marcus Rashford and Ruben Loftus-Cheek revived Southgate's attack in the closing stages of the game and the England manager told The Guardian: "The guys who came on had a different threat. Good teams score late goals, because if you dominate the ball like that, the opposition tire".
Harry Kane gave England the lead in the 11th minute, knocking home a rebound after Tunisia goalkeeper Mouez Hassen kept out an initial effort.
It was down to captain Kane to swing the game back in their favour with minutes to go, reacting fastest to Harry Maguire's flick-on to nod home the victor at the far post.
Ultimately, England won anyway but the failure to not award them a penalty could have been a game-changing situation - for all the wrong reasons. I guess as players there's nothing we can do about that.
In reality, however, Tunisia, like Morocco, may well look back on a contest in which they didn't play to their strengths and ultimately paid the price.
"I thought they were pretty ordinary", Dunphy said on RTE Sport. The lads will have gone in the dressing room buzzing and he needs to sit them down and watch it. "Maybe tonight we could have run out of time, but I believe the best teams in the world have that belief in what they are doing and in the end they break teams down".
"The important thing was always the three points, but it was good that, especially in the first half, we got the performance we were looking for".
"We've seen it at the World Cup that big teams like Germany, Argentina, France and Brazil have all struggled with that".