"I am not sure anything went wrong, as such", he said.
Per the footage doing the rounds on Twitter, fans in Stratford are seen singing the Three Lions' It's coming home and rushing into an IKEA store.
England were nearly made to pay straight after the interval and would have been pegged back if Pickford had not produced a top-drawer save to keep out a Berg header.
All smiles for Dele Alli as he scores England's second (Owen Humphreys, PA).
The last time Sweden reached the semi-finals was in US 1994 where they finished third while England last made it into semi-finals in Italy 1990.
It was a mature display after the 120-minute slog against Colombia, with Southgate plumping for an unchanged side on an afternoon when those exertions initially took their toll. "And also that little ball that Jesse sent in for Dele, that was great".
For once it was not Harry Kane who claimed the plaudits as the tournament's top scorer was kept quiet, but England found another hero at the other end of the pitch as Jordan Pickford produced three superb saves to shut out the workmanlike Swedes.
These are qualities that have helped this England team close a distance with their public that seemed firmly entrenched after a succession of recent tournament failures.
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Seven-times champion Williams rallied from 5-3 down in the second set to put away France's Kristina Mladenovic 7-5 7-6 (7-2). Seven-time victor Williams, the favourite for the women's title, plays Russian qualifier Evgeniya Rodina.
Maguire had his first England goal and how they needed that.
Maguire outmaneuvered Emil Forsberg to nod Ashley Young's kick down between goalkeeper Robin Olson and Ola Toivonen, who was guarding the post.
Shortly after being closed out in a risky position, the forward was put through and surely relieved to belatedly see an offside flag he was guilty of looking for before being denied one-on-one by Olsen.
England make it on Venezuela's national newspaper's backpage, with the headline "Semifinal Set".
It's been a long time between drinks for England football fans.
England needed 30 minutes to break down typically stubborn resistance from Sweden's sound defence.
Maguire's aerial threat has been a feature of England's march into the last four.
Delight would have been short-lived had England's Jordans not denied Claesson in quick succession, with Pickford's impressive save met by a key block to the follow-up by Henderson.
"It's nice within football to affect some things and the players have that opportunity as well because they have a voice and they have influence on young people, especially the young people from the areas they came from", Southgate added.