Doesn't?! Does so to me...for instance Lucic in her infamous loss to Carla S. N. made a total of 3 in as many sets, while the winner made 2 (so 5 by both players combined). But anyway, yes, her team confessed several times that this elbow issue prevents her from using her serve to it's full potential, and her coach even used the phrase "plays without her 1st serve" more than once.
Ana goes for a lot on her 2nd Serve though. Doesn't she hit aces off it sometimes
Anett+Them Eesti Gals have to be the best players that ever existed
Kaia hit 24 Aces (the WTA record) vs Safarova Tokyo Round 1 2008
It's on dubrovacki.hr I can dig it out for you, but that's about the only important thing in the article. The rest talks about how the match went in terms of score and how she'll play doubles today as well - so nothing we don't already know.