Southgate's emphasis on building a team for the future could lead to several Premier League veterans, including Joe Hart and Gary Cahill, being excluded from his provisional World Cup squad, which will be announced later on Wednesday.
Southgate's number one goalkeeping choice for Russian Federation is sure to be broached on Thursday morning, along with questions on the captaincy and composition of his stand-by list.
"If I was Gareth Southgate I would sell this on youngsters", he said at the BBC's launch of their coverage of the tournament.
Yet Dixon - who played 22 times for England - believes that Hart, who was a member of the squads at the 2010 and 2014 World Cups, should have been chosen having been there before.
RYAN Bertrand will not be playing for England at the World Cup in Russian Federation next month after Three Lions boss Gareth Southgate overlooked the Saints left-back.
Uncapped Liverpool right-back Alexander-Arnold, 19, has made just three appearances for England's U21s with this his first senior call-up.
Dennis Wise won 21 caps for England
Gareth Southgate has confirmed Joe Hart's dwindling form with West Ham cost the goalkeeper a place in England's World Cup squad. "When we pick young players, it's not just because they are young, it's because their performances deserve it".
However, he has demonstrated regularly a capacity to think outside of the box when it comes to squad selection and tactics - none more so than when he fielded Kyle Walker as a centre-back against the Netherlands in March.
For example, Alexander-Arnold, Ashley Young, Fabian Delph and Eric Dier can play in defence and midfield, while the attacking midfielders included also offer a certain fluidity.
"We have a lot of energy and athleticism in the team but also players equally comfortable in possession".
Neither are even in the standby squad for the tournament, with England's first game coming against Tunisia on June 18.
However, his lack of fitness means he has to settle with a stand-by place alongside Jake Livermore, Tom Heaton, James Tarkowski and Lewis Cook.
Up front, Southgate possesses a world-class striker in In Harry Kane, while Jamie Vardy once again proved his credentials for Leicester with 20 league goals this season.More news: Tencent shares rise after Q1 profit beats
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