CREATE TABLE table_51159 ("Date" TEXT, "Tournament" TEXT, "Round" TEXT, "Ground" TEXT, "Opponent" TEXT, "Score 1" TEXT)

What tournament took place on Ground A with 8 rounds?
SELECT "Tournament" FROM table_51159 WHERE "Ground" = 'a' AND "Round" = '8'
SELECT "Tournament" FROM "table_51159" WHERE "Ground" = 'a' AND "Round" = '8'