I feel like if Serbia had got one back earlier in the second half then Southgate would have been forced to undo his thinking a little but luckily for him, they didn't.
He's going to have to go back to the drawing board and think a bit more on this as the next two matches come up. I can't see England not getting out of this group, but I do feel like they need to be tactically a bit better at ball control when they're up vs allowing the other team to have it and roam as they wish. It might work in this group but against a more adept side they'll get scored on with the kind of pressure Serbia was pushing onto them.