Every time I see Demented-Eva play (not very often, fortunately), I can't believe her pathetic serve, and how she's so unprofessional as to do nothing about it.
Doesn't she ever think to herself, "My, I'm in the top 10 even though I've got a serve which is worse than a decent 11-year old's. Perhaps if I got a decent coach and practised a bit, I'd win a few more matches, and hey, I might get to No 1. Wouldn't that be something."
Hingis was the same. It was clear to everyone that her 50 mph service delivery was the reason for her fall from No 1. What did she do about it... absolutely diddly squat.