CREATE TABLE table_61844 ("Tournament" TEXT, "2009" TEXT, "2010" TEXT, "2011" TEXT, "2012" TEXT, "2013" TEXT)

What is the 2013 of the grand slam tournaments?
SELECT "2013" FROM table_61844 WHERE "Tournament" = 'grand slam tournaments'
SELECT "2013" FROM "table_61844" WHERE "Tournament" = 'grand slam tournaments'