CREATE TABLE table_32720 ("Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent in the final" CLOB, "Score" CLOB)

On what date did the match against Flavio Cipolla, played on a clay surface, occur?
SELECT "Date" FROM table_32720 WHERE "Surface" = 'clay' AND "Opponent in the final" = 'flavio cipolla'
SELECT "Date" FROM "table_32720" WHERE "Opponent in the final" = 'flavio cipolla' AND "Surface" = 'clay'