CREATE TABLE table_31927 ("Outcome" TEXT, "Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponent in the final" TEXT, "Score" TEXT)

What tournament was played on May 29, 2010?
SELECT "Tournament" FROM table_31927 WHERE "Date" = 'may 29, 2010'
SELECT "Tournament" FROM "table_31927" WHERE "Date" = 'may 29, 2010'