What is the 2009 value in the 2011 Grand Slam Tournaments?
CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "2005" text,
  "2006" text,
  "2007" text,
  "2008" text,
  "2009" text,
  "2010" text,
  "2011" text,
  "2012" text,
  "2013" text
);
SELECT "2009" FROM "singles_performance_timeline" WHERE "2011"='grand slam tournaments';