CREATE TABLE table_66661 ("Outcome" TEXT, "Date" TEXT, "Tournament" TEXT, "Surface" TEXT, "Opponent" TEXT, "Score" TEXT)

What was the tournament that had byron black playing against magnus larsson?
SELECT "Tournament" FROM table_66661 WHERE "Opponent" = 'magnus larsson'
SELECT "Tournament" FROM "table_66661" WHERE "Opponent" = 'magnus larsson'