She better not withdraw. Playing the YEC is always a good omen for her tennis for next season.
2001 - won YEC, dominated 2002
2002 - lost YEC final, began 2003 with a 21 match winning streak
2004 - lost YEC final, won 2005 AO
2007 - flopped YEC, then started off really strongly in 2008 through April. Unfortunately her only loss was in Melbourne.
2008 - flopped YEC, won 2009 AO
2009 - won YEC, started 2010 in great form and won in Melbourne despite being 80% crippled
So all 5 times that she's completed a match at the YEC, she went on to win the next slam.