CREATE TABLE table_5550 ("Outcome" TEXT, "Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

What is the date of the tournament with Alena Tarasova as the opponent?
SELECT "Date" FROM table_5550 WHERE "Opponent" = 'alena tarasova'
SELECT "Date" FROM "table_5550" WHERE "Opponent" = 'alena tarasova'