Why oh why will she not get a coach to iron out her serve. Theres no excuses for it and it really is beyond funny, you're not going to progress to the top 100 if you DF on big points time and time again.
It doesn't really make sense to blame Katie's serve when she served most of the DFs in the second set, and had a better 1st % in the first! From the stats, it looks like she failed to capitalise on 2nd serves more than anything - impossible to tell tho.
It arguably does make sense when you're giving DF on BP and set points, its no good at tour level & just throws momentum and confidence at your opponent.