CREATE TABLE table_60815 ("Year" FLOAT, "Grand Slam" TEXT, "Round" TEXT, "Winner" TEXT, "Loser" TEXT)

In which round was Barbara Hawcroft the loser?
SELECT "Round" FROM table_60815 WHERE "Loser" = 'barbara hawcroft'
SELECT "Round" FROM "table_60815" WHERE "Loser" = 'barbara hawcroft'