วันที่คู่ต่อสู้คือ guillermo garc al pez albert portas คือวันที่ใด?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What are the dates where the opponent was guillermo garc a-l pez albert portas?It is not neccessary to use all the tables.
 table_69838:  "Outcome" [ text]  "Date" [ text]  "Surface" [ text]  "Partner" [ text]  "Opponents" [ text]  "Score" [ text] 
SELECT "Date" FROM table_69838 WHERE "Opponents" = 'guillermo garcía-lópez albert portas'