Re: What makes Pironkova so good on grass?
Pironkova is just a bad match-up for venus. She gives venus no pace to work with, and forces her to play bad (kinda like hingis in a way particularly, at the end of her career where she would rely on forcing opponents to make errors). Pironkova's also a tricky player. And as someone already mentioned, shes a great mover, her first serve has a good amount of pace, and she slices which is effective on the surface.