With her 4th round Ana is also up to #12 in the race, passing Kanepi. If she loses today, Kim, Kiri, Vinci & Fran can all pass her with a SF; Shvedova, Lisicki and Paszek would all need to make the final. I can totally see Kim doing it
If Ana wins however, things look much better: she goes up to 11, passing Caro - in which case only Clijsters could still pass her with a semi - most of the others mentioned above would need a final and Paszek would need to win.
With a semi final, Ana passes Bartoli to #10 but stays 24 points behind Na who picked up 100 points for making the second round. At this point, Clijsters & Kirilenko can pass her with a final - Vinci and Paszek would both have lost seeing as Ana needs to beat one of them to get this far
Shvedova and Lisicki would need to win.
If Ana reaches the final she breaks the top 8, passing Na and Stosur. She needs Petra and Serena to lose in the 4R to pass either of them, so if they both did the highest Ana could reach is #6
and last but not least, if Ana won the tournament ....
She goes to minimum #5, #4 if Kerber loses to Clijsters
Of course the last 2 scenarios are a long shot from here, but it's nice to dream. She really really needs to beat Vika today to give herself a shot at qualifying for Istanbul later on in the year. If she loses it will be very hard/unlikely. If she does win though, she has a great chance to get to the semis so her most likely race ranking after the tournament is #12 (hoping that those below her don't pass the QFs) or #10 with a semi final.
RG really stuffed her up in this regard, she virtually gifted Errani a place in the YEC
PS. hope those projections are all correct!