Yeah you're right she doesnt df much against top players. Only Madrid final last year from memory,
I was surprised by that stat. Worse than kerber, radwanska or errani whose second serves are so slow theyre almost going backwards. I guess it includes double faults as points lost on second serve and is a bit skewed by vika playing a higher proportion of matches on clay due to her injury. Still it shows up the second serve as the major thing to work on (the first serve is holding up okay).
Official bagel and breadstick server of Vikaland