I was actually thinking the opposite. Dementieva and Schnyder have a close H2H, but Dementieva has won their last few matches easily, and is playing much better this year overall. Jankovic-Bammer met here in the 4R last year and went three sets then - when Jelena was playing better tennis than she's playing now. And Bammer seems to have found her form on the hardcourts this summer. Just given Jankovic's state of mind, I think this could be closer than most are predicting.