CREATE TABLE table_9939 ("Tournament" TEXT, "Surface" TEXT, "Week" TEXT, "Winner" TEXT, "Finalist" TEXT, "Semifinalists" TEXT)

What is the Tournament, on the Week of May 5?
SELECT "Tournament" FROM table_9939 WHERE "Week" = 'may 5'
SELECT "Tournament" FROM "table_9939" WHERE "Week" = 'may 5'