There are people who thinks DDP will win because he hasn't been submitted for awhile. He was once submitted only one in his MMA career but after that they think he could avoid Chimaev take downs or if Chimaev is successful in taking him down, Chimaev will struggle to actually submit him and will be weary in the later rounds. Its still possible.

But yep agree that Chimaev's takedown can be hard to avoid. All Whittaker did the entire time is just defend himself.