England's star trio struggle to operate simultaneously - is Tuchel right?
With six wins from six matches, zero goals allowed and tournament placement secured with two group games to spare, England manager Thomas Tuchel could suggest he has chosen wisely throughout qualification.
However, in the build-up to Thursday's Wembley encounter against Serbia, he initiated discussion when he claimed that three of the nation's top talents - Jude Bellingham, Phil Foden and Harry Kane - cannot play in the identical lineup.
"Presently, if we keep the structure, they are unable to feature.
"They can but not with current tactics, not maintaining equilibrium that we established and not for the structure that incorporates wingers who are like specialists in their positions. We currently utilize with defensive, central, attacking midfielders and striker."
From certain starters to fighting for spots
The Manchester City and Real Madrid stars have been used in wide positions for England in the past, but the manager's choices indicate that Marcus Rashford and Bukayo Saka are his preferred options on the wide areas respectively.
So can Bellingham, Foden and Kane coexist in the lineup?
The previous England manager apparently believed they could.
Bellingham, Foden and Kane featured in every England's seven matches at the European Championship in Germany, where Southgate's side were defeated by Spain in the final.
In the 16 fixtures the three have featured alongside each other, England have triumphed 10 times, tied three matches and been defeated three times, registering 36 scores and conceding 14.
Tactical insight: Foden's flexibility provides alternatives
Tuchel has employed a four-two-three-one setup that transforms formation when England attack.
The Aston Villa player has been the primary attacking midfielder because of his excellent dribbling, shooting ability and ability to attack the box when the forward retreats.
Tuchel has mentioned preferring specialist wingers. Saka and Gordon regularly feature on the wings and can retain the ball skillfully, engage in one-on-one situations, and arrive in the box to score.
In midfield behind the attackers, Tuchel plays with a midfield two consisting of a disciplined defensive presence and one with more license to support offensive play.
What solutions exist for the trio?
Foden and Bellingham would be vying against other creative midfielders for the attacking midfield position, with Kane likely to start up front.
Foden could feature as the number nine, which theoretically could allow both Bellingham and Foden to operate without the captain.
There is one way all three could coexist effectively and Tuchel alluded to it this week.
"With his club, he operates similarly to a box-to-box or creative role, so potentially in future we consider him as a number eight," he said.
Foden has been used in a more all-purpose midfield role this season.
That has enabled him to operate from deeper areas and could make him an option as the central midfielder, next to a more defensive number six.
This would then permit Bellingham to feature as the number 10 and Kane as the nine.
Regardless of if Tuchel decides to set England up like this at the World Cup, what appears positive is his willingness to leave big players out in the name of balance.