The current top 10 players in Roland Garros 2012: W Maria Sharapova (2000), F Sara Errani (1400), SF Petra Kvitova (900), SF Samantha Stosur (900), QF Angelique Kerber (500), R16 Victoria Azarenka (280), R16 Na Li (280), R32 Agnieszka Radwanska (160), R32 Caroline Wozniacki (160), R128 Serena Williams (5).
Top 10 players ranking points before Roland Garros 2013 when the last year's points are reduced and how they might gain points from the second round (R64) onwards. If they lose in the first round (R128), it gives them only 5 ranking points:
I think Vika has very good chances to improve her ranking to #2 after Roland Garros if she plays on clay as well as she did in Rome. I hope my calculations are correct, because the ranking system can be tricky sometimes.