CREATE TABLE table_31551 ("Outcome" CLOB, "Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

On what date was Patty Fendick an opponent?
SELECT "Date" FROM table_31551 WHERE "Opponent" = 'patty fendick'
SELECT "Date" FROM "table_31551" WHERE "Opponent" = 'patty fendick'