Just as Ivanovic is descending a London East End staircase here, she descended the staircase of the WTA rankings this week.  The charming Serb dropped 30 spots from #28 to a pedestrian #58, which one would expect to exert a serious impact on her upcoming schedule.  Here are some of the other notable moves in the WTA and ATP rankings after Indian Wells:WTA:Wozniacki (2):   New career high after reaching the final.Azarenka (7):  Dropped a spot, trading places with Dementieva, after failing to reproduce last year's semifinal result.Jankovic (8):  The title netted her just one spot, little reward for all of her hard work here.Stosur (10):   The Aussie's top-10 debut comes after a semifinal run.Sharapova (12):  The highest ranking of her comeback so far.Wickmayer (14):  A career high despite a relatively early exit.Zheng (19):  Back in the top 20 after a pair of gritty three-set wins.Kleybanova (22):  A career high after upsetting Clijsters en route to the quarters.Zvonareva (23):  A nine-place drop after failing to defend her title.Henin (33):  Accumulated the three-tournament minimum necessary to be listed in the rankings, but still required a wildcard for Miami.Pavlyuchenkova (35):  A ten-place drop after failing to defend last year's semifinal result.ATP:Nadal (4):  Falls ever-so-slightly behind Murray after failing to defend his title.Gonzalez (11):  Out of the top 10 (replaced by Tsonga) after skipping Indian Wells in order to aid Chilean earthquake relief.Ljubicic (13):  Halved his ranking by stunning three top-8 players en route to the title.Berdych (20):  Reaches the top 20 after crushing Verdasco and Troicki.Wawrinka (23):  Rankings slide continues after skipping the event.Baghdatis (30):  Back in the top 30 after upsetting Federer in a comeback that continues to accelerate.Tomorrow:  WTA Miami preview; Wednesday:  ATP Miami preview!  :)