I agree that Claire’s movement is wonky - she runs very quickly once she’s in motion, but as another poster has noticed before, the initial split step/explosive push off is quite slow. I wonder if this is something that can be worked on or is just a natural bodily reaction sort of thing. That’s so tough vs. Cornet, who is a master of moving the ball and putting it in uncomfortable spots.Alize Cornet is coming for Iga Świątek wig.
As for Liu, she's overrated - very basic player and the movement is not good enough, you could see a stark difference against the Frenchie. There was no way she could win against Cornet on grass unless Cornet would throw in a stinker or get injured again.