Odds are very high. Thought Berrettini would be +900 max here. Of course it's a tough one for the Italian player, but his big serve + big forehand combo can help him here, hopefully. Nadal needs to play a mediocre match for this bet to have a chance to hit, but it can happen.
I back Berrettini because last year Basilashvili and Khachanov both pushed Nadal very hard in this same tournament. BOL everyone.