I think she is capable of beating anyone in her division because she has a chin, strength and exceptional BJJ.
Her post fight interview she said she needs to work on her BJJ, but that's not accurate at all. She needs a MMA wrestling coach. Her takedown accuracy is awful.
She probably submits anyone outside the top 6, and has a chance against the top 5 as we saw tonight.
I'm sure there will not be enough credit given to Yan. She fought a near flawless fight and had an excellently executed game plan to beat Dern. Her fight IQ and white belt BJJ defense was on point.
Any little mistake and Dern has a submission win so kudos to Yan.