Southgate has retained the bulk of the squad that finished fourth at this summer's 2018 FIFA World Cup, with 18 of the 23 keeping their places.
The England manager has made just five changes to the 23-man party that so impressed in Russian Federation, with Alex McCarthy in for Nick Pope as third choice goalkeeper and James Tarkowski replacing Phil Jones, who is injured.
However, there's still no place for the likes of Joe Hart, Chris Smalling and Jack Wilshere.
The Three Lions finished fourth in Russian Federation with performances which captivated the nation and are expected to draw big crowds for their UEFA Nations League match against Spain and friendly with Switzerland.
"I was particularly pleased, I was telling him, 'You can not play better than you did".
Adam Lallana, Joe Gomez, Jordan Henderson and Trent Alexander-Arnold have been called up for England duty.
Southgate attempted to play down England's interest in West Ham's Declan Rice, stressing that he was still "with Ireland".
"With us only being three games into the (domestic) season, I felt some continuity was important". Others haven't really had the opportunity to force themselves ahead of those guys.
The Manchester United defender Phil Jones has missed out through injury after limping away from Monday's defeat by Spurs.
"In this moment he is feeling the good results of the hard work and the good results of many people that work with him and try to make him a proper football player because a proper football player is a player of consistency", Mourinho told a news conference on Friday.
"We're on the back of a successful tournament", said Southgate.
What do you think of England's latest squad? "It depends how good we want to be and what level we want to challenge at, but that is a clear indication of the task we have got". I did that myself for a few years.
"We need to win and win in a good way". It was great that we were able to have mature conversations about that.