I'm relatively confident. Spain have played the best football but the best footballing team doesn't always win - witness Man City finishing ahead of Arsenal and Liverpool as an example in the PL.
Saka absolutely murdered Cucurella in the PL a couple of months ago and so either Spain double up on Saka which leaves space for Foden to weave his magic, or they don't double up on Saka, and Saka causes mayhem.
Spain do have the best midfielder in the world in Rodri, up front they are a bit light and their defence can be got at.
We'll need to make sure Kane actually enters the penalty box when we break instead of being 20 yards behind and someone can teach Foden the offside rule between now and Sunday. I think it's a 50/50 game I really do. Spain will cause us problems but I think the spaces in midfield that they will leave will allow us to counter at speed.
I do feel Kane, Rice and Bellingham are half cooked and really in need of a rest but one last push is all it needs and then they can go on holiday and I'm sure they will be able to miss part of their clubs' pre season tours to recuperate.