CREATE TABLE table_34806 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "Margin of victory" TEXT, "Runner-up" TEXT)

In which tournament was vijay singh a runner-up?
SELECT "Tournament" FROM table_34806 WHERE "Runner-up" = 'vijay singh'
SELECT "Tournament" FROM "table_34806" WHERE "Runner-up" = 'vijay singh'