คู่ต่อสู้คือใครในรอบที่สอง?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
Who was the opponent during the second round?It is not neccessary to use all the tables.
 table_40857:  "Season" [ text]  "Round" [ text]  "Country" [ text]  "Opponent" [ text]  "Result" [ text] 
SELECT "Opponent" FROM table_40857 WHERE "Round" = 'second round'