CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "2007" text,
  "2008" text,
  "2009" text,
  "2010" text,
  "2011" text,
  "2012" text
);

Question: Which Tournament in 2010 also has Grand Slam tournaments in 2011
SQL: SELECT "2010" FROM "singles_performance_timeline" WHERE "2011"='grand slam tournaments';