Blaydes is pillow fisted and has only KOed the who's who of glass chins on the feet (JDS/ Daukaus).
On the ground he's only finished Overeem and Shamil - with the Overeem one being a formality as Rogan was calling for the finish minutes earlier as Overeem was so gassed and defenceless.
He has shown no real craft on the ground to date - not saying it won't come, but your betting on something that hasn't really been shown to exist yet.
In saying that, Sergei's ground game looked non-existent off his back vs Reem, but you would have to think training for a wrestler he will be a little bit better prepared.
Likewise I would be expecting his TDD to be better here. Blaydes couldn't even manage to get a TD on Lewis in 6.5 mins of fight time anyway FFS.
I would be taking the over here. As Gianni always says: "Fade the narrative".