The England skipper will be presented with the Golden Boot for his World Cup exploits before the Three Lions face Spain at a sold-out Wembley tonight.
Southgate, though, insists his England side can not afford to bask in the afterglow of Russian Federation for long.
"We got on so well and to be back so quickly". The important thing for us was to show that we are still very solid, one more time. "That was a moment in time and it'll be a summer (to remember)".
Unusually, the Germans started with four central defenders and with Joshua Kimmich switching from right back to a holding midfield position, as coach Joachim Loew tried to strike a better balance between attack and defence than his team had done in Russian Federation.
The Nations League showdown kicks-off at 7.45pm BST from Wembley.
Nadal 'bagelled' but survives Thiem test to reach semis
The match proved far closer than Thiem's attempt to unseat Nadal in the French Open final earlier in 2018, when the Spaniard won 6-4 6-3 6-2.
Sky Sports customers will also be able to live stream the action via the Sky Go app, which is available to download across a range of devices.
David De Gea appears set to remain Spain's first-choice goalkeeper after new coach Luis Enrique insisted he "never had any doubts" about the question of who should be No. 1 for the national side.
Southampton goalkeeper Alex McCarthy could make his debut after being rewarded for his impressive form with a first worldwide call-up.
Luke Shaw has returned to the England fold following a strong start to the season despite Manchester United's poor results.
"If you look back through history, England's competitive record (of winning) against top teams is non-existent", he added.
Meanwhile, Sergio Ramos said there was renewed enthusiasm around the squad since Luis Enrique, who was a serial victor during his three seasons in charge of Barcelona, had taken over.