Question: For the game played on 31 July 2007 on Clay what was the score?
SQL: SELECT "Score" FROM "2-16474033-3" WHERE "Surface" = 'Clay' AND "Date" = '31 July 2007';

Question: When was Pablo Andújar the opponent?
SQL: SELECT "Date" FROM "2-16474033-3" WHERE "Opponent" = 'Pablo Andújar';