CREATE TABLE table_45440 ("Outcome" CLOB, "Date" CLOB, "Tournament" CLOB, "Surface" CLOB, "Opponent" CLOB, "Score" CLOB)

Who was the opponent in the math that was played in Nice on a clay court?
SELECT "Opponent" FROM table_45440 WHERE "Surface" = 'clay' AND "Tournament" = 'nice'
SELECT "Opponent" FROM "table_45440" WHERE "Surface" = 'clay' AND "Tournament" = 'nice'