That's not a bad recovery from 1-5 to 5-5. Is Katie now going to relax, thinking she "done it" and then go on and lose is she going to put the proverbial boot in?
Pliskova's serve seems to be getting worse match by match. Her ball toss was all over the place in the Wimbledon match, and she was often stretching for the ball. Seems to be finding the net a lot again today, although it comes and goes in patches.