I feel like this game is going to be closer than it should be because Deschamps wants France to play a...pragmatic (boring, defensive) style of soccer which plays into Croatia's hands a bit. Croatia played an extra game in the knockout stages because of all the extra time games and have to be fatigued at this point. I'd love to see Deschamps do something out of the box and replace Matuidi (who is redundant with Kante in the midfield) with Dembele and just let him and Mbappe challenge the Croatian back line with their speed and skill.
I'm not doubting Croatia at this point, but you have to think eventually they're going to run out of gas, but they've been so resilient in this tournament that if France gives them any opportunity they'll seize it. If France just comes at them early they can take control and never look back, but I think it's going to be a much more reserved, measured game which at least gives Croatia a fighting chance.