Doubt Southgate knows his strongest side going into our first game against Croatia. 433, 4231, and 343 are all formations he's experimented with, so it really could be any of those.
With him wanting to keep it tight in the first game, and us not looking defensively great with a back four, then I'd imagine Southgate will probably go with three at the back, but who knows?
343
Pickford
Walker Stones Mings
James Henderson Rice Chilwell
Mount Kane Grealish
433
Pickford
Walker Stones Mings Shaw
Henderson Rice Mount
Sterling Kane Grealish
4231
Pickford
Walker Stones Mings Shaw
Henderson Rice
Sterling Mount Grealish
Kane
This is what I predict Southgate will do, not me!