CREATE TABLE table_7893 ("Outcome" CLOB, "Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

On what date did Jesse Levine play on a hard surface?
SELECT "Date" FROM table_7893 WHERE "Surface" = 'hard' AND "Opponent" = 'jesse levine'
SELECT "Date" FROM "table_7893" WHERE "Opponent" = 'jesse levine' AND "Surface" = 'hard'