Name the least new points for steffi graf
CREATE TABLE "1999_australian_open" (
  "sd" real,
  "rk" real,
  "player" text,
  "points" real,
  "points_defending" real,
  "points_won" real,
  "new_points" real,
  "status" text
);
SELECT MIN("new_points") FROM "1999_australian_open" WHERE "player"='Steffi Graf';