Table: cipolla_matches
Columns: date
tournament
surface
opponent
score

Question: For the game played on 31 July 2007 on clay what was the score?
SQL: SELECT "score" FROM cipolla_matches WHERE "surface" = 'clay' AND "date" = '31 july 2007'

Question: When was Pablo Andújar the opponent?
SQL: SELECT "date" FROM cipolla_matches WHERE "opponent" = 'pablo andújar'