CREATE TABLE table_203_142 (id DECIMAL, "pos" TEXT, "no" DECIMAL, "rider" TEXT, "bike" TEXT, "laps" DECIMAL, "time" TEXT, "grid" DECIMAL, "points" DECIMAL)

in the 2007 phillip island superbike world championship round superbike race 1 classification who was in the top position ?
SELECT "rider" FROM table_203_142 ORDER BY "pos" LIMIT 1
SELECT "rider" FROM "table_203_142" ORDER BY "pos" NULLS FIRST LIMIT 1