A spate of withdrawals looked to have taken the edge of Friday's encounter, yet an experimental and inexperienced side made the most of their opportunity to shine in a spirited 0-0 draw.
"It was an interesting game", Southgate said.
Asked if the assured debuts of Loftus-Cheek and now injured Winks made him feel more positive about his options, the England manager said: "Yeah, and I think the slightly different system opens up different possibilities". It was a bit end-to-end, but I thought we showed real composure with the ball throughout the team.
Should Loftus-Cheek be an option for England's World Cup squad after one game? He's a good boy and he still has a lot to work on, like all of us.
"And when you see his physical size, you think you'll also see a certain type of player". There's been an energy about the group.
"There's so much more to come from him but there's no point getting too carried away at this point".
Now he's added Bournemouth midfielder Lewis Cook and Liverpool striker Dominic Solanke to the England squad preparing to face Brazil at Wembley on Tuesday, according to The Telegraph.
"It was just a straightforward goalkeeping drill, nothing out of the ordinary and just caught his finger awkwardly", Southgate said, having confirmed England Under-21s goalkeeper Angus Gunn will join the seniors for the first time.
"At times it was hard for them to press us because of the composure we showed and the system we played, so I think it was a brilliant experience for our players". I think it's a bit of a no-brainer.
"Going out and playing this season has helped him".