CREATE TABLE table_48757 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

What is Tournament, when Margin Of Victory is 1 Stroke, and when Date is 18 Jan 2009?
SELECT "Tournament" FROM table_48757 WHERE "Margin of victory" = '1 stroke' AND "Date" = '18 jan 2009'
SELECT "Tournament" FROM "table_48757" WHERE "Date" = '18 jan 2009' AND "Margin of victory" = '1 stroke'