CREATE TABLE table_32530 ("Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponents in the final" TEXT, "Score" TEXT)

What day did he play on hard with tom mercer?
SELECT "Date" FROM table_32530 WHERE "Surface" = 'hard' AND "Partner" = 'tom mercer'
SELECT "Date" FROM "table_32530" WHERE "Partner" = 'tom mercer' AND "Surface" = 'hard'