I thought about this too, as I have Argentina +430 from the start. Germany is +136 to win in regulation and -145 to win overall. I'm not sure there's a great hedge at the moment except to take a small bet on Germany to win in regulation. I will probably be betting Over 2, as I think Germany will play offensively and force Argentina to play a faster match than they've been use to so far. I think they can play that type of speed, but their opponents aren't letting them.
