CREATE TABLE table_69838 ("Outcome" TEXT, "Date" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents" TEXT, "Score" TEXT)

What are the dates where the opponent was guillermo garc a-l pez albert portas?
SELECT "Date" FROM table_69838 WHERE "Opponents" = 'guillermo garcía-lópez albert portas'
SELECT "Date" FROM "table_69838" WHERE "Opponents" = 'guillermo garcía-lópez albert portas'